CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common stock	Retained earnings	Accumulated other comprehensive loss
Beginning balance (in shares) at Jan. 01, 2017		42,171,000
Beginning balance at Jan. 01, 2017	$ 525,179	$ 1	$ 536,611	$ (11,433)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	55,456		55,456
Other comprehensive income (loss), net of tax	4,629			4,629
Purchases and retirement of common stock (in shares)		(1,530,000)
Purchases and retirement of common stock	(36,680)		(36,680)
Issuances under equity plans, including tax benefits (in shares)		418,000
Issuances under equity plans, including tax benefits	(1,481)		(1,481)
Stock-based compensation (in shares)		39,000
Stock-based compensation	7,744		7,744
Ending balance (in shares) at Dec. 31, 2017		41,098,000
Ending balance at Dec. 31, 2017	554,847	$ 1	561,650	(6,804)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	65,754		65,754
Other comprehensive income (loss), net of tax	(6,320)			(6,320)
Purchases and retirement of common stock (in shares)		(1,371,000)
Purchases and retirement of common stock	(34,818)		(34,818)
Issuances under equity plans, including tax benefits (in shares)		299,000
Issuances under equity plans, including tax benefits	(1,900)		(1,900)
Stock-based compensation (in shares)		28,000
Stock-based compensation	$ 13,876		13,876
Change in accounting standard cumulative-effect adjustment			1,525	(1,525)
Ending balance (in shares) at Dec. 30, 2018	40,054,000	40,054,000
Ending balance at Dec. 30, 2018	$ 591,439	$ 1	606,087	(14,649)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	63,073		63,073
Other comprehensive income (loss), net of tax	1,411			1,411
Purchases and retirement of common stock (in shares)		(1,855,000)
Purchases and retirement of common stock	(38,826)		(38,826)
Issuances under equity plans, including tax benefits (in shares)		365,000
Issuances under equity plans, including tax benefits	(893)		(893)
Stock-based compensation (in shares)		29,000
Stock-based compensation	9,769		9,769
Change in accounting standard cumulative-effect adjustment	$ 0
Ending balance (in shares) at Dec. 29, 2019	38,593,000	38,593,000
Ending balance at Dec. 29, 2019	$ 625,973	$ 1	$ 639,210	$ (13,238)