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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, 2018
Dec. 31, 2017
Derivative Instruments And Hedging Activities Disclosure [Abstract]    
Balance at January 1, $ (5,640) $ 1,882
Deferred (losses) gains on cash flow hedges 3,624 (6,990)
Reclassified to earnings 5,020 (532)
Balance at December 31, $ 3,004 $ (5,640)