Other Comprehensive Income (Loss) - Components of Other Comprehensive Gain (Loss) and Related Income Tax Effects (Parenthetical) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Equity [Abstract]
Change in other comprehensive loss on derivatives, tax expense (benefit)	$ 0	$ 846	$ 799
Change in other comprehensive loss on marketable securities, tax (expense) benefit	2	(1)	(15)
Reclassification adjustments for items included in Net Income (Loss) on derivatives, tax (expense) benefit	3	(2,737)	1,279
Reclassification adjustments for items included in Net Income (Loss) on marketable securities, tax (expense) benefit	$ 0	$ 0	$ 7