Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Sep. 26, 2020	Jun. 27, 2020	Sep. 28, 2019	Jun. 29, 2019	Sep. 26, 2020	Sep. 28, 2019	Mar. 28, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 624,007	$ 607,586	$ 550,337	$ 529,588	$ 607,586	$ 529,588
Cumulative effect of implementing ASU 2016-13, net	386,134				386,134		$ 355,144
Net income	15,049	16,674	20,885	21,282	31,723	42,167
Issuance of common stock under stock incentive plans	522	(533)	941	(1,252)
Stock-based compensation	1,103	945	818	630
Other comprehensive income, net	7	68	23	89
Ending balance	$ 640,688	$ 624,007	$ 573,004	$ 550,337	$ 640,688	$ 573,004
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, common stock, shares	9,177,064	9,173,242	9,111,624	9,098,320	9,173,242	9,098,320
Issuance of common stock under stock incentive plans, shares	11,098	3,822	15,842	13,304
Ending balance, common stock, shares	9,188,162	9,177,064	9,127,466	9,111,624	9,188,162	9,127,466
Beginning balance	$ 92	$ 92	$ 91	$ 91	$ 92	$ 91
Net income	0	0	0	0
Issuance of common stock under stock incentive plans	0	0	0	0
Stock-based compensation	0	0	0	0
Other comprehensive income, net	0	0	0	0
Ending balance	92	92	91	91	92	91
Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	252,672	252,260	248,825	249,447	252,260	249,447
Net income	0	0	0	0
Issuance of common stock under stock incentive plans	522	(533)	941	(1,252)
Stock-based compensation	1,103	945	818	630
Other comprehensive income, net	0	0	0	0
Ending balance	254,297	252,672	250,584	248,825	254,297	250,584
Retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	371,085	355,144	301,360	280,078	355,144	280,078
Net income	15,049	16,674	20,885	21,282
Issuance of common stock under stock incentive plans	0	0	0	0
Stock-based compensation	0	0	0	0
Other comprehensive income, net	0	0	0	0
Ending balance	386,134	371,085	322,245	301,360	386,134	322,245
Accumulated other comprehensive income (loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	158	90	61	(28)	90	(28)
Net income	0	0	0	0
Issuance of common stock under stock incentive plans	0	0	0	0
Stock-based compensation	0	0	0	0
Other comprehensive income, net	7	68	23	89
Ending balance	$ 165	$ 158	$ 84	$ 61	$ 165	$ 84
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