Stockholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Jun. 29, 2013	Jun. 30, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, common stock, shares	6,967,954
Beginning balance	$ 176,890
Stock option exercises, amount	50
Stock-based compensation	1,146
Net income	1,826	860
Other comprehensive loss	(71)
Ending balance, common stock, shares	6,969,954
Ending balance	179,841
Increase (Decrease) in Redeemable Noncontrolling Interest [Roll Forward]
Redeemable noncontrolling interest, beginning balance	91,994
Net income	2,035	758
Other comprehensive loss	(71)
Redeemable noncontrolling interest, ending balance	93,958
Pre-tax unrealized loss on available-for-sale investments	216
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, common stock, shares	6,967,954
Beginning balance	70
Stock option exercises, shares	2,000
Stock option exercises, amount	0
Stock-based compensation	0
Net income	0
Other comprehensive loss	0
Ending balance, common stock, shares	6,969,954
Ending balance	70
Additional paid-in capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	135,053
Stock option exercises, amount	50
Stock-based compensation	1,146
Net income	0
Other comprehensive loss	0
Ending balance	136,249
Retained earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	41,590
Stock option exercises, amount	0
Stock-based compensation	0
Net income	1,826
Other comprehensive loss	0
Ending balance	43,416
Accumulated other comprehensive income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	177
Stock option exercises, amount	0
Stock-based compensation	0
Net income	0
Other comprehensive loss	(71)
Ending balance	$ 106