Senior Notes and Other Long-Term Debt - Components of Long-Term Debt (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Apr. 03, 2015
Senior Notes
Total senior notes long-term, net	$ 582,343	$ 582,657
Other Long-Term Debt
Other	833	822
Total other long-term debt	279,404	223,996
Total other long-term debt	279,404	223,996
Less: current portion of other long-term debt	264	260
Other long-term debt, net	279,140	223,736
Total debt	861,747	806,653
Less: current portion	264	260
Long-term debt, net	861,483	806,393
Revolving credit facility [Member]
Other Long-Term Debt
Credit Facility	225,000	210,000
Ex-Im Credit Facility [Member]
Other Long-Term Debt
Credit Facility	61,580	20,476
Unamortized discount on the Ex-Im Credit Facility	(8,009)	(7,302)
2020 Notes [Member]
Senior Notes
Principal amounts of Senior Notes issued	575,000	575,000
Unamortized premium on the 2020 Notes	7,343	7,657
Total senior notes, net of premium	582,343	582,657
Total senior notes, net of premium	582,343	582,657
Less: current portion of the senior notes	0	0
Total senior notes long-term, net	$ 582,343	$ 582,657