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Commitments and Contingencies - Additional Information (Detail) (USD $)
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12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Schedule of Operating Leases [Line Items] | |||
| Fair value of guarantees | $ 0 | ||
| Rental expense | $ 15,700,000 | $ 14,900,000 | $ 15,400,000 |
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Minimum
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| Schedule of Operating Leases [Line Items] | |||
| Lease expiration period | 10 years | ||
| Lease renewal periods | 1 year | ||
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Maximum
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| Schedule of Operating Leases [Line Items] | |||
| Lease expiration period | 25 years | ||
| Lease renewal periods | 5 years | ||
| X | ||||||||||
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- Definition
Lease Expiration Period No definition available.
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| X | ||||||||||
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- Definition
Lease Renewal Term No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the amount of contractual guarantees to which the Company is obligated as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses. No definition available.
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