Quarterly report pursuant to Section 13 or 15(d)

Principal Repayment Requirements Under Long-Term Agreements Outstanding (Detail)

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Principal Repayment Requirements Under Long-Term Agreements Outstanding (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Debt Disclosure [Abstract]    
2015 $ 1,541  
2016 3,096  
2017 3,097  
2018 3,099  
2019 3,089  
Thereafter 275,335  
Long-term debt $ 289,257 $ 290,793