Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Aggregate Minimum Principal Maturities of Long-Term Debt (Detail)

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Long-Term Debt - Aggregate Minimum Principal Maturities of Long-Term Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Debt Instrument [Line Items]  
2013 $ 4,019
2014 3,333
2015 3,267
2016 3,242
2017 299,578
2018 and thereafter $ 265,000