Senior Notes and Other Long-Term Debt - Components of Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Apr. 03, 2015
Senior Notes
Total senior notes long-term, net	$ 581,702	$ 582,657
Other Long-Term Debt
Other	853	822
Total other long-term debt	355,527	223,996
Total other long-term debt	355,527	223,996
Less: current portion of other long-term debt	270	260
Other long-term debt, net	355,257	223,736
Total debt	937,229	806,653
Less: current portion	270	260
Long-term debt, net	936,959	806,393
Revolving credit facility [Member]
Other Long-Term Debt
Credit Facility	200,000	210,000
Ex-Im Credit Facility [Member]
Other Long-Term Debt
Credit Facility	160,700
Credit Facility	174,347	20,476
Unamortized discount on the Ex-Im Credit Facility	(19,673)	(7,302)
2020 Notes [Member]
Senior Notes
Principal amounts of Senior Notes issued	575,000	575,000
Unamortized premium on the 2020 Notes	6,702	7,657
Total senior notes, net of premium	581,702	582,657
Total senior notes, net of premium	581,702	582,657
Less: current portion of the senior notes	0	0
Total senior notes long-term, net	$ 581,702	$ 582,657