Accumulated Other Comprehensive Income (Loss) - Summary of Components of AOCI (Detail) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, Beginning	$ 332,732	$ 348,275	$ 183,456
Other comprehensive income (loss) before reclassifications	1,800	(1,600)	2,200
Income tax (expense) benefit	(500)	300	(1,800)
Amounts reclassified from AOCI			2,500
Total other comprehensive income (loss)	1,281	(1,352)	2,917
Balance, Ending	288,172	332,732	348,275
Foreign Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, Beginning	(400)	(100)
Other comprehensive income (loss) before reclassifications	(100)	(300)	(100)
Total other comprehensive income (loss)	(100)	(300)	(100)
Balance, Ending	(500)	(400)	(100)
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, Beginning	(1,000)
Other comprehensive income (loss) before reclassifications	1,900	(1,300)
Income tax (expense) benefit	(500)	300
Total other comprehensive income (loss)	1,400	(1,000)
Balance, Ending	400	(1,000)
Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, Beginning			(3,000)
Other comprehensive income (loss) before reclassifications			2,300
Income tax (expense) benefit			(1,800)
Amounts reclassified from AOCI			2,500
Total other comprehensive income (loss)			3,000
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, Beginning	(1,412)	(60)	(2,977)
Balance, Ending	$ (131)	$ (1,412)	$ (60)