Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Dec. 26, 2020	Sep. 26, 2020	Jun. 27, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Dec. 26, 2020	Dec. 28, 2019	Mar. 28, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 640,688	$ 624,007	$ 607,586	$ 573,004	$ 550,337	$ 529,588	$ 607,586	$ 529,588
Cumulative effect of implementing ASU 2016-13, net	405,835						405,835		$ 355,144
Net income	19,701	15,049	16,674	20,898	20,885	21,282	51,424	63,065
Issuance of common stock under stock incentive plans	480	522	(533)	537	941	(1,252)
Stock-based compensation	887	1,103	945	820	818	630
Other comprehensive income, net	(15)	7	68	1	23	89
Ending balance	$ 661,741	$ 640,688	$ 624,007	$ 595,260	$ 573,004	$ 550,337	$ 661,741	$ 595,260
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, common stock, shares	9,188,162	9,177,064	9,173,242	9,127,466	9,111,624	9,098,320	9,173,242	9,098,320
Issuance of common stock under stock incentive plans, shares	4,075	11,098	3,822	13,725	15,842	13,304
Ending balance, common stock, shares	9,192,237	9,188,162	9,177,064	9,141,191	9,127,466	9,111,624	9,192,237	9,141,191
Beginning balance	$ 92	$ 92	$ 92	$ 91	$ 91	$ 91	$ 92	$ 91
Net income	0	0	0	0	0	0
Issuance of common stock under stock incentive plans	0	0	0	0	0	0
Stock-based compensation	0	0	0	0	0	0
Other comprehensive income, net	0	0	0	0	0	0
Ending balance	92	92	92	91	91	91	92	91
Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	254,297	252,672	252,260	250,584	248,825	249,447	252,260	249,447
Net income	0	0	0	0	0	0
Issuance of common stock under stock incentive plans	480	522	(533)	537	941	(1,252)
Stock-based compensation	887	1,103	945	820	818	630
Other comprehensive income, net	0	0	0	0	0	0
Ending balance	255,664	254,297	252,672	251,941	250,584	248,825	255,664	251,941
Retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	386,134	371,085	355,144	322,245	301,360	280,078	355,144	280,078
Net income	19,701	15,049	16,674	20,898	20,885	21,282
Issuance of common stock under stock incentive plans	0	0	0	0	0	0
Stock-based compensation	0	0	0	0	0	0
Other comprehensive income, net	0	0	0	0	0	0
Ending balance	405,835	386,134	371,085	343,143	322,245	301,360	405,835	343,143
Accumulated other comprehensive income (loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	165	158	90	84	61	(28)	90	(28)
Net income	0	0	0	0	0	0
Issuance of common stock under stock incentive plans	0	0	0	0	0	0
Stock-based compensation	0	0	0	0	0	0
Other comprehensive income, net	(15)	7	68	1	23	89
Ending balance	$ 150	$ 165	$ 158	$ 85	$ 84	$ 61	$ 150	$ 85
Accounting Standards Update 2016-13 | Cumulative effect of implementing ASU 2016-13, net
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of implementing ASU 2016-13, net									(733)
Accounting Standards Update 2016-13 | Common Stock | Cumulative effect of implementing ASU 2016-13, net
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of implementing ASU 2016-13, net									0
Accounting Standards Update 2016-13 | Additional paid-in capital | Cumulative effect of implementing ASU 2016-13, net
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of implementing ASU 2016-13, net									0
Accounting Standards Update 2016-13 | Retained earnings | Cumulative effect of implementing ASU 2016-13, net
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of implementing ASU 2016-13, net									(733)
Accounting Standards Update 2016-13 | Accumulated other comprehensive income (loss) | Cumulative effect of implementing ASU 2016-13, net
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of implementing ASU 2016-13, net									$ 0