Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Mar. 28, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 607,586	$ 529,588
Cumulative effect of implementing ASU 2016-13, net	371,085		$ 355,144
Net income	16,674	21,282
Issuance of common stock under stock incentive plans	(533)	(1,252)
Stock-based compensation	945	630
Other comprehensive income, net	68	89
Ending balance	$ 624,007	$ 550,337
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, common stock, shares	9,173,242	9,098,320
Issuance of common stock under stock incentive plans, shares	3,822	13,304
Ending balance, common stock, shares	9,177,064	9,111,624
Beginning balance	$ 92	$ 91
Net income	0	0
Issuance of common stock under stock incentive plans	0	0
Stock-based compensation	0	0
Other comprehensive income, net	0	0
Ending balance	92	91
Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	252,260	249,447
Net income	0	0
Issuance of common stock under stock incentive plans	(533)	(1,252)
Stock-based compensation	945	630
Other comprehensive income, net	0	0
Ending balance	252,672	248,825
Retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	355,144	280,078
Net income	16,674	21,282
Issuance of common stock under stock incentive plans	0	0
Stock-based compensation	0	0
Other comprehensive income, net	0	0
Ending balance	371,085	301,360
Accumulated other comprehensive income (loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	90	(28)
Net income	0	0
Issuance of common stock under stock incentive plans	0	0
Stock-based compensation	0	0
Other comprehensive income, net	68	89
Ending balance	$ 158	$ 61
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