Unaudited Condensed Consolidated Statements of Stockholder's Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Beginning balance at Dec. 31, 2018	$ 627,552	$ 32	$ 793,585	$ (15)	$ (166,050)
Beginning balance (in shares) at Dec. 31, 2018		31,562,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in unrealized gains and losses on available-for-sale investments, net of tax	12			12
Change in unrealized gains and losses on derivatives, net of tax	17			17
Net income (loss)	12,843				12,843
Stock-based compensation	6,457		6,457
Repurchase of common stock	(15,000)				(15,000)
Repurchase of common stock (in shares)		(436,000)
Restricted stock unit withholdings	(3,344)				(3,344)
Restricted stock unit withholdings (in shares)		(89,000)
Issuance of common stock under stock-based compensation plans	4,371		4,371
Issuance of common stock under stock-based compensation plans (in shares)		430,000
Ending balance at Mar. 31, 2019	632,908	$ 32	804,413	14	(171,551)
Ending balance (in shares) at Mar. 31, 2019		31,467,000
Beginning balance at Dec. 31, 2018	627,552	$ 32	793,585	(15)	(166,050)
Beginning balance (in shares) at Dec. 31, 2018		31,562,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock	$ (32,000)
Repurchase of common stock (in shares)	(1,000,000.0)
Restricted stock unit withholdings (in shares)	(168,000)
Ending balance at Jun. 30, 2019	$ 622,072	$ 31	812,034	12	(190,005)
Ending balance (in shares) at Jun. 30, 2019		31,110,000
Beginning balance at Mar. 31, 2019	632,908	$ 32	804,413	14	(171,551)
Beginning balance (in shares) at Mar. 31, 2019		31,467,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in unrealized gains and losses on derivatives, net of tax	(2)			(2)
Net income (loss)	839				839
Stock-based compensation	6,739		6,739
Repurchase of common stock	(16,980)	$ (1)			(16,979)
Repurchase of common stock (in shares)		(570,000)
Restricted stock unit withholdings	(2,314)				(2,314)
Restricted stock unit withholdings (in shares)		(79,000)
Issuance of common stock under stock-based compensation plans	882		882
Issuance of common stock under stock-based compensation plans (in shares)		292,000
Ending balance at Jun. 30, 2019	622,072	$ 31	812,034	12	(190,005)
Ending balance (in shares) at Jun. 30, 2019		31,110,000
Beginning balance at Dec. 31, 2019	608,693	$ 30	831,365	21	(222,723)
Beginning balance (in shares) at Dec. 31, 2019		29,925,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in unrealized gains and losses on derivatives, net of tax	350			350
Net income (loss)	(4,173)				(4,173)
Stock-based compensation	6,336		6,336
Repurchase of common stock	(15,008)				(15,008)
Repurchase of common stock (in shares)		(584,000)
Restricted stock unit withholdings	(1,347)				(1,347)
Restricted stock unit withholdings (in shares)		(54,000)
Issuance of common stock under stock-based compensation plans	2,940		2,940
Issuance of common stock under stock-based compensation plans (in shares)		305,000
Ending balance at Mar. 29, 2020	597,791	$ 30	840,641	371	(243,251)
Ending balance (in shares) at Mar. 29, 2020		29,592,000
Beginning balance at Dec. 31, 2019	608,693	$ 30	831,365	21	(222,723)
Beginning balance (in shares) at Dec. 31, 2019		29,925,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Repurchase of common stock	$ (22,500)
Repurchase of common stock (in shares)	(900,000)
Restricted stock unit withholdings (in shares)	(149,000)
Ending balance at Jun. 28, 2020	$ 606,146	$ 30	853,137	7	(247,028)
Ending balance (in shares) at Jun. 28, 2020		29,684,000
Beginning balance at Mar. 29, 2020	597,791	$ 30	840,641	371	(243,251)
Beginning balance (in shares) at Mar. 29, 2020		29,592,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Change in unrealized gains and losses on derivatives, net of tax	(364)			(364)
Net income (loss)	5,983				5,983
Stock-based compensation	9,172		9,172
Repurchase of common stock	(7,500)				(7,500)
Repurchase of common stock (in shares)		(315,000)
Restricted stock unit withholdings	(2,260)				(2,260)
Restricted stock unit withholdings (in shares)		(95,000)
Issuance of common stock under stock-based compensation plans	3,324		3,324
Issuance of common stock under stock-based compensation plans (in shares)		502,000
Ending balance at Jun. 28, 2020	$ 606,146	$ 30	$ 853,137	$ 7	$ (247,028)
Ending balance (in shares) at Jun. 28, 2020		29,684,000