Earnings (loss) Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2013	Dec. 29, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Earnings Per Share [Abstract]
Net income (loss)	$ 7,223	$ 8,518	$ 7,133	$ 5,932	$ 11,242	$ (283,443)	$ 14,844	$ 9,623	$ 28,806	$ (247,734)	$ 52,862
Weighted-average common shares outstanding (basic)									16,627,000	17,725,000	17,680,000
Effect of dilutive securities from equity awards									62,000	0	115,000
Weighted-average common shares outstanding (diluted)									16,689,000	17,725,000	17,795,000
Basic earnings (loss) per common share	$ 0.45	$ 0.52	$ 0.43	$ 0.34	$ 0.64	$ (16.12)	$ 0.83	$ 0.54	$ 1.73	$ (13.98)	$ 2.99
Diluted earnings (loss) per common share	$ 0.44	$ 0.52	$ 0.43	$ 0.34	$ 0.64	$ (16.12)	$ 0.83	$ 0.53	$ 1.73	$ (13.98)	$ 2.97
Non-dilutive equity awards excluded from computation of weighted-average common shares outstanding (shares)									2,648,137	2,870,784	2,323,094