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Financial Derivatives and Hedging Activities - Fair Value Amounts Recorded as Component of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Balance at January 1, $ (178) $ 3,282
Deferred gains on cash flow hedges 307 4,703
Reclassified to earnings (298) (873)
Balance at March 31, $ (169) $ 7,112