Debt (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Mar. 27, 2012	May 05, 2010
Debt Instrument [Line Items]
Total debt	$ 398,589	$ 383,500
Current maturities, net of discount of $278 and $440 as of March 31, 2014 and 2013, respectively	(7,297)	(10,793)
Total long-term debt	391,292	372,707
Unamortized discount, current maturities	278	440
10.5% Senior Notes
Debt Instrument [Line Items]
Total debt	358,144	358,773
Stated interest rate (as a percent)	10.50%	10.50%		10.50%
Unamortized premium	3,144	3,773	6,100
Advanced payment from OEM
Debt Instrument [Line Items]
Total debt	20,095	22,944
Unamortized discount	323	1,056
Revolving Line of Credit
Debt Instrument [Line Items]
Total debt	18,449	0
Other
Debt Instrument [Line Items]
Total debt	$ 1,901	$ 1,783