Consolidated Statements of Stockholders' Equity and Redeemable Noncontrolling Interest Statement - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income
Beginning balance, common stock, shares at Mar. 30, 2013		6,967,954
Beginning balance at Mar. 30, 2013	$ 176,890	$ 70	$ 135,053	$ 41,590	$ 177
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	16,238	0	0		0
Unrealized gain on available-for-sale securities	158	$ 0	0	0	158
Stock Issued During Period, Shares, New Issues		9,500
Stock option exercises and associated tax benefits, amount	408	$ 0	408	0	0
Stock-based compensation	2,353	$ 0	2,353	0	0
Ending balance, common stock, shares at Mar. 29, 2014		8,844,824
Ending balance at Mar. 29, 2014	290,433	$ 88	232,081	57,828	436
Redeemable noncontrolling interest, beginning balance at Mar. 30, 2013	91,994
Increase (Decrease) in Redeemable Noncontrolling Interest [Roll Forward]
Net income	2,468
Other comprehensive income	(76)
Redeemable noncontrolling interest, ending balance at Mar. 29, 2014	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	23,817	0	0		0
Unrealized gain on available-for-sale securities	68	$ 0	0	0	68
Stock Issued During Period, Shares, New Issues		14,375
Stock option exercises and associated tax benefits, amount	4,179	$ 1	4,178	0	0
Stock-based compensation	$ 1,657	$ 0	1,657	0	0
Ending balance, common stock, shares at Mar. 28, 2015	8,859,199	8,859,199
Ending balance at Mar. 28, 2015	$ 320,154	$ 89	237,916	81,645	504
Increase (Decrease) in Redeemable Noncontrolling Interest [Roll Forward]
Net income	0
Other comprehensive income	0
Redeemable noncontrolling interest, ending balance at Mar. 28, 2015	0
Increase (Decrease) in Redeemable Noncontrolling Interest [Roll Forward]
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests	(94,386)
Net income	28,541	0	0		0
Unrealized gain on available-for-sale securities	785	$ 0	0	0	785
Stock Issued During Period, Shares, New Issues		68,790
Stock option exercises and associated tax benefits, amount	1,984	$ 0	1,984	0	0
Stock-based compensation	$ 1,762	$ 0	1,762	0	0
Ending balance, common stock, shares at Apr. 02, 2016	8,927,989	8,927,989
Ending balance at Apr. 02, 2016	$ 353,226	$ 89	$ 241,662	$ 110,186	$ 1,289
Increase (Decrease) in Redeemable Noncontrolling Interest [Roll Forward]
Net income	0
Other comprehensive income	0
Redeemable noncontrolling interest, ending balance at Apr. 02, 2016	$ 0