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
Sep. 30, 2014
Dec. 31, 2013
Debt Disclosure [Abstract]    
2015 $ 2,871  
2016 3,095  
2017 3,098  
2018 3,095  
2019 3,091  
Thereafter 271,127  
Long-term debt $ 286,377 $ 290,793