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Change in Rate Based on Leverage Ratio (Detail)
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Sep. 30, 2014
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Sep. 30, 2013
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
9.625%
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9.625%
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LIBOR Loans | Less than 3.00 to 1.00
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
2.25%
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LIBOR Loans | Greater than or equal to 3.00 to 1.00 but less than 4.00 to 1.00
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
2.50%
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LIBOR Loans | Greater than or equal to 4.00 to 1.00 but less than 5.00 to 1.00
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
2.75%
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LIBOR Loans | Greater than or equal to 5.00 to 1.00 but less than 6.00 to 1.00
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
3.00%
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LIBOR Loans | Greater than or equal to 6.00 to 1.00
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
3.50%
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Base Rate | Less than 3.00 to 1.00
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
1.25%
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Base Rate | Greater than or equal to 3.00 to 1.00 but less than 4.00 to 1.00
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
1.50%
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Base Rate | Greater than or equal to 4.00 to 1.00 but less than 5.00 to 1.00
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
1.75%
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Base Rate | Greater than or equal to 5.00 to 1.00 but less than 6.00 to 1.00
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
2.00%
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Base Rate | Greater than or equal to 6.00 to 1.00
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
2.50%
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Less than 3.25 to 1.00 | Applicable Fee Rate
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
0.40%
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Less than 3.25 to 1.00 | Base Rate
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
0.75%
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Less than 3.25 to 1.00 | Eurodollar Rate Loans
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
2.25%
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Greater than or equal to 3.25 to 1.00 but less than 4.50 to 1.00 | Applicable Fee Rate
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
0.50%
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Greater than or equal to 3.25 to 1.00 but less than 4.50 to 1.00 | Base Rate
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
0.75%
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Greater than or equal to 3.25 to 1.00 but less than 4.50 to 1.00 | Eurodollar Rate Loans
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
2.50%
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Greater than or equal to 4.50 to 1.00 but less than 6.00 to 1.00 | Applicable Fee Rate
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
0.60%
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Greater than or equal to 4.50 to 1.00 but less than 6.00 to 1.00 | Base Rate
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
1.25%
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Greater than or equal to 4.50 to 1.00 but less than 6.00 to 1.00 | Eurodollar Rate Loans
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
3.00%
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Greater than or equal to 6.00 to 1.00 | Applicable Fee Rate
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
0.75%
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Greater than or equal to 6.00 to 1.00 | Base Rate
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
2.25%
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Greater than or equal to 6.00 to 1.00 | Eurodollar Rate Loans
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| Debt Instrument [Line Items] |
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| Change in rate based on leverage ratio, contractual interest rate |
3.50%
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