Stockholders' Equity (Details) (USD $)	0 Months Ended	3 Months Ended		9 Months Ended
	Jul. 22, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 28, 2013	Dec. 29, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, common stock, shares				6,967,954
Beginning balance				$ 176,890,000
Stock option exercises, shares	1,867,370
Stock option exercises, amount				162,000
Stock-based compensation				2,163,000
Net income		5,892,000	1,457,000	12,028,000	3,571,000
Other comprehensive loss				(114,000)
Acquisition of noncontrolling interest				(94,386,000)
Pre-tax unrealized loss on available-for-sale investments				(292,000)
Ending balance, common stock, shares		8,839,824		8,839,824
Ending balance		285,515,000		285,515,000
Increase (Decrease) in Redeemable Noncontrolling Interest [Roll Forward]
Redeemable noncontrolling interest, beginning balance				91,994,000
Net income		0	1,564,000	2,468,000	3,749,000
Other comprehensive loss				(76,000)
Redeemable noncontrolling interest, ending balance		0		0
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, common stock, shares				6,967,954
Beginning balance				70,000
Stock option exercises, shares				4,500
Stock option exercises, amount				0
Stock-based compensation				0
Net income				0
Other comprehensive loss				0
Acquisition of noncontrolling interest, shares				1,867,370
Acquisition of noncontrolling interest				(18,000)
Ending balance, common stock, shares		8,839,824		8,839,824
Ending balance		88,000		88,000
Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance				135,053,000
Stock option exercises, amount				162,000
Stock-based compensation				2,163,000
Net income				0
Other comprehensive loss				0
Acquisition of noncontrolling interest				(94,267,000)
Ending balance		231,645,000		231,645,000
Retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance				41,590,000
Stock option exercises, amount				0
Stock-based compensation				0
Net income				12,028,000
Other comprehensive loss				0
Acquisition of noncontrolling interest				0
Ending balance		53,618,000		53,618,000
Accumulated other comprehensive income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance				177,000
Stock option exercises, amount				0
Stock-based compensation				0
Net income				0
Other comprehensive loss				(114,000)
Acquisition of noncontrolling interest				(101,000)
Ending balance		$ 164,000		$ 164,000