Accumulated Other Comprehensive Income (Loss) - Summary of Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity [Abstract]
Current period unrealized gain (loss) on cash flow hedges, Pre-Tax Amount	$ (565)	$ (1,655)	$ 712
Reclassification adjustments on cash flow hedges, Pre-Tax Amount	972	653	(1,829)
Unrealized gains (losses) on cash flow hedges, net, Pre-Tax Amount	407	(1,002)	(1,117)
Current period unrealized gain (loss) on investments, Pre-Tax Amount	(249)	(59)	34
Reclassification adjustments on investments, Pre-Tax Amount	0	0	(206)
Unrealized gains (losses) on investments, net, Pre-Tax Amount	(249)	(59)	(172)
Other comprehensive income (loss), Pre-Tax Amount	158	(1,061)	(1,289)
Current period unrealized gain (loss) on cash flow hedges, Tax Expense (Benefit)	0	0	0
Reclassification adjustments on cash flow hedges, Tax Expense (Benefit)	0	0	0
Unrealized gains (losses) on cash flow hedges, net, Tax Expense (Benefit)	0	0	0
Current period unrealized gain (loss) on investments, Tax Expense (Benefit)	0	0	0
Reclassification adjustments on investments, Tax Expense (Benefit)	0	0	0
Unrealized gains (losses) on investments, net, Tax Expense (Benefit)	0	0	0
Other comprehensive income (loss), Tax Expense (Benefit)	0	0	0
Current period unrealized gain (loss) on cash flow hedges, After-Tax Amount	(565)	(1,655)	712
Reclassification adjustments on cash flow hedges, After-Tax Amount	972	653	(1,829)
Unrealized gains (losses) on cash flow hedges, net, After-Tax Amount	407	(1,002)	(1,117)
Current period unrealized gain (loss) on investments, After-Tax Amount	(249)	(59)	34
Reclassification adjustments on investments, After-Tax Amount	0	0	(206)
Unrealized gains (losses) on investments, After-Tax Amount	(249)	(59)	(172)
Other comprehensive income (loss)	$ 158	$ (1,061)	$ (1,289)