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
Mar. 31, 2014
Dec. 31, 2013
Debt Disclosure [Abstract]    
2015 $ 2,439  
2016 3,098  
2017 3,095  
2018 3,104  
2019 3,087  
Thereafter 276,061  
Long-term debt $ 290,884 $ 290,793