Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, common stock, shares			9,044,858
Ending balance, common stock, shares	9,098,320		9,098,320
Beginning balance			$ 457,106
Net income	$ 13,384	$ 21,427	48,651	$ 39,362
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options			(114)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			2,936
Other Comprehensive Income (Loss)			39
Ending balance	$ 509,072		$ 509,072
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, common stock, shares			9,044,858
Stock option exercises, shares			53,462
Ending balance, common stock, shares	9,098,320		9,098,320
Beginning balance			$ 90
Net income			0
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options			1
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			0
Other Comprehensive Income (Loss)			0
Ending balance	$ 91		91
Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			246,197
Net income			0
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options			(115)
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			2,936
Other Comprehensive Income (Loss)			0
Ending balance	249,018		249,018
Retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			209,381
Net income			48,651
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options			0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			0
Other Comprehensive Income (Loss)			0
Ending balance	260,107		260,107
Accumulated other comprehensive income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			1,438
Net income			0
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options			0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition			0
Other Comprehensive Income (Loss)			39
Ending balance	(144)		(144)
Accounting Standards Update 2016-01 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	1,621		1,621
Accounting Standards Update 2016-01 [Member] | Reclassification out of Accumulated Other Comprehensive Income [Domain]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	(1,621)		(1,621)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets	$ 454		$ 454