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Financial Derivatives and Hedging Activities - Fair Value Amounts Recorded as Component of Accumulated Other Comprehensive Income (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Balance at January 1, $ 3,282 $ (1,296)
Deferred (losses) gains on cash flow hedges 2,292 3,923
Reclassified to earnings (5,752) 655
Balance at December 31, $ (178) $ 3,282