Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income/(Loss)	Retained Earnings (Accumulated Deficit)	Treasury Stock	Total
Beginning balance, value at Mar. 31, 2018	$ 251	$ 339,148	$ (2,285)	$ 536,978	$ (39,540)	$ 834,552
Balance (in shares) at Mar. 31, 2018	25,123,694				(713,687)
Net income				27,467		27,467
Share-based compensation		3,766				3,766
Repurchase of common stock					$ (1,491)	(1,491)
Repurchase of common stock (in shares)					(11,865)
Exercise of equity awards	$ 2	6,416				6,418
Exercise of equity awards (in shares)	100,142
Change in net prior service cost and actuarial losses, net of taxes			194			194
Issuance of restricted stock
Issuance of restricted stock (in shares)	87,345
Impact from adoption of ASU 2018-02 and 2014-09				(277)		(277)
Currency translation adjustments			(4,061)			(4,061)
Ending balance, value at Jun. 30, 2018	$ 253	349,330	(6,152)	564,168	$ (41,031)	866,568
Balance (in shares) at Jun. 30, 2018	25,311,181				(725,552)
Beginning balance, value at Mar. 31, 2018	$ 251	339,148	(2,285)	536,978	$ (39,540)	834,552
Balance (in shares) at Mar. 31, 2018	25,123,694				(713,687)
Net income						73,756
Currency translation adjustments						(4,758)
Ending balance, value at Dec. 29, 2018	$ 256	371,667	(6,461)	610,457	$ (44,251)	931,668
Balance (in shares) at Dec. 29, 2018	25,566,831				(748,985)
Beginning balance, value at Jun. 30, 2018	$ 253	349,330	(6,152)	564,168	$ (41,031)	866,568
Balance (in shares) at Jun. 30, 2018	25,311,181				(725,552)
Net income				30,111		30,111
Share-based compensation		4,039				4,039
Repurchase of common stock					$ (2,040)	(2,040)
Repurchase of common stock (in shares)					(15,522)
Exercise of equity awards	$ 2	12,989				12,991
Exercise of equity awards (in shares)	192,300
Change in net prior service cost and actuarial losses, net of taxes			194			194
Issuance of restricted stock
Issuance of restricted stock (in shares)	6,210
Currency translation adjustments			440			440
Ending balance, value at Sep. 29, 2018	$ 255	366,358	(5,518)	594,279	$ (43,071)	912,303
Balance (in shares) at Sep. 29, 2018	25,509,691				(741,074)
Net income				16,178		16,178
Share-based compensation		3,904				3,904
Other		154				154
Repurchase of common stock					$ (1,180)	(1,180)
Repurchase of common stock (in shares)					(7,911)
Exercise of equity awards	$ 1	1,251				1,252
Exercise of equity awards (in shares)	16,050
Change in net prior service cost and actuarial losses, net of taxes			194			194
Issuance of restricted stock
Issuance of restricted stock (in shares)	41,090
Currency translation adjustments			(1,137)			(1,137)
Ending balance, value at Dec. 29, 2018	$ 256	371,667	(6,461)	610,457	$ (44,251)	931,668
Balance (in shares) at Dec. 29, 2018	25,566,831				(748,985)
Beginning balance, value at Mar. 30, 2019	$ 256	378,655	(7,467)	641,894	$ (44,772)	968,566
Balance (in shares) at Mar. 30, 2019	25,607,196				(752,913)
Net income				30,499		30,499
Share-based compensation		4,802				4,802
Repurchase of common stock					$ (9,514)	(9,514)
Repurchase of common stock (in shares)					(69,877)
Exercise of equity awards	$ 1	275				276
Exercise of equity awards (in shares)	4,356
Change in net prior service cost and actuarial losses, net of taxes			178			178
Issuance of restricted stock
Issuance of restricted stock (in shares)	86,490
Impact from adoption of ASU 2018-02 and 2014-09			(1,289)	1,289
Currency translation adjustments			2,542			2,542
Ending balance, value at Jun. 29, 2019	$ 257	383,732	(6,036)	673,682	$ (54,286)	997,349
Balance (in shares) at Jun. 29, 2019	25,698,042				(822,790)
Beginning balance, value at Mar. 30, 2019	$ 256	378,655	(7,467)	641,894	$ (44,772)	968,566
Balance (in shares) at Mar. 30, 2019	25,607,196				(752,913)
Net income						92,284
Currency translation adjustments						2,297
Ending balance, value at Dec. 28, 2019	$ 259	405,725	(5,925)	735,467	$ (56,320)	1,079,206
Balance (in shares) at Dec. 28, 2019	25,863,146				(835,087)
Beginning balance, value at Jun. 29, 2019	$ 257	383,732	(6,036)	673,682	$ (54,286)	997,349
Balance (in shares) at Jun. 29, 2019	25,698,042				(822,790)
Net income				31,270		31,270
Share-based compensation		5,059				5,059
Repurchase of common stock					$ (334)	(334)
Repurchase of common stock (in shares)					(2,048)
Exercise of equity awards	$ 1	10,184				10,185
Exercise of equity awards (in shares)	138,898
Change in net prior service cost and actuarial losses, net of taxes			178			178
Issuance of restricted stock
Issuance of restricted stock (in shares)	5,677
Currency translation adjustments			(1,869)			(1,869)
Ending balance, value at Sep. 28, 2019	$ 258	398,975	(7,727)	704,952	$ (54,620)	1,041,838
Balance (in shares) at Sep. 28, 2019	25,842,617				(824,838)
Net income				30,515		30,515
Share-based compensation		5,135				5,135
Repurchase of common stock					$ (1,700)	(1,700)
Repurchase of common stock (in shares)					(10,249)
Exercise of equity awards	$ 1	1,615				1,616
Exercise of equity awards (in shares)	18,419
Change in net prior service cost and actuarial losses, net of taxes			178			178
Issuance of restricted stock
Issuance of restricted stock (in shares)	2,110
Currency translation adjustments			1,624			1,624
Ending balance, value at Dec. 28, 2019	$ 259	$ 405,725	$ (5,925)	$ 735,467	$ (56,320)	$ 1,079,206
Balance (in shares) at Dec. 28, 2019	25,863,146				(835,087)