Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 22,579	$ 7,775	$ (39,164)
Other comprehensive income (loss):
Realized losses on cash flow hedges reclassified from accumulated other comprehensive income, net of tax of $(5,007), $(1,219) and $(956), respectively	10,605	2,592	2,022
Net change in unrealized losses on cash flow hedges, net of tax of $14,989, $10,598 and $4,156, respectively	(31,677)	(22,596)	(8,751)
Realized losses on short-term investments reclassified from accumulated other comprehensive income, net of tax of $—, $— and $(319), respectively	0	0	716
Net change in unrealized gains (losses) on available-for-sale investments, net of tax of $—, $(6) and $69, respectively	0	12	(149)
Reclassification of income tax effects of the Tax Cuts and Jobs Act of 2017	0	0	(102)
Comprehensive income (loss)	$ 1,507	$ (12,217)	$ (45,428)