Long-Term Debt - Components of Long-term Debt (Details) - USD ($)	3 Months Ended
	Jun. 30, 2018	Dec. 30, 2017	Dec. 14, 2017	Sep. 30, 2017	Jun. 24, 2017	Nov. 09, 2015
Debt Instrument [Line Items]
Total	$ 691,860,000			$ 395,653,000	$ 435,449,000
Less current portion	(119,000)			(375,000)	(375,000)
Long-term portion	691,741,000			395,278,000	435,074,000
Senior notes
Debt Instrument [Line Items]
Unamortized debt issuance costs	(8,741,000)			(4,840,000)	(5,039,000)
Total	691,259,000			395,160,000	394,961,000
Senior notes | Senior notes, interest at 6.125%, payable semi-annually, principal due November 2023
Debt Instrument [Line Items]
Notes	$ 400,000,000			400,000,000	400,000,000	$ 400,000,000
Debt instrument maturity period	Nov. 01, 2023
Debt instrument interest rate stated, percentage	6.125%					6.125%
Senior notes | Senior notes, interest at 5.125%, payable semi-annually, principal due February 2028
Debt Instrument [Line Items]
Notes	$ 300,000,000		$ 300,000,000.0	0	0
Total	$ 295,500,000
Debt instrument maturity period	Feb. 01, 2028
Debt instrument interest rate stated, percentage	5.125%	5.125%	5.125%
Asset-based revolving credit facility, interest at LIBOR plus a margin of 1.25% to 1.50% or Base Rate plus a margin of 0.25% to 0.50%, final maturity April 2021
Debt Instrument [Line Items]
Total	$ 0			0	40,000,000
Debt instrument maturity period	Apr. 01, 2021
Asset-based revolving credit facility, interest at LIBOR plus a margin of 1.25% to 1.50% or Base Rate plus a margin of 0.25% to 0.50%, final maturity April 2021 | Base rate borrowings
Debt Instrument [Line Items]
Applicable interest margin rate on the credit facility	0.25%
Asset-based revolving credit facility, interest at LIBOR plus a margin of 1.25% to 1.50% or Base Rate plus a margin of 0.25% to 0.50%, final maturity April 2021 | LIBOR-based borrowings
Debt Instrument [Line Items]
Applicable interest margin rate on the credit facility	1.25%
Asset-based revolving credit facility, interest at LIBOR plus a margin of 1.25% to 1.50% or Base Rate plus a margin of 0.25% to 0.50%, final maturity April 2021 | Minimum | Base rate borrowings
Debt Instrument [Line Items]
Applicable interest margin rate on the credit facility	0.25%
Asset-based revolving credit facility, interest at LIBOR plus a margin of 1.25% to 1.50% or Base Rate plus a margin of 0.25% to 0.50%, final maturity April 2021 | Minimum | LIBOR-based borrowings
Debt Instrument [Line Items]
Applicable interest margin rate on the credit facility	1.25%
Asset-based revolving credit facility, interest at LIBOR plus a margin of 1.25% to 1.50% or Base Rate plus a margin of 0.25% to 0.50%, final maturity April 2021 | Maximum | Base rate borrowings
Debt Instrument [Line Items]
Applicable interest margin rate on the credit facility	0.50%
Asset-based revolving credit facility, interest at LIBOR plus a margin of 1.25% to 1.50% or Base Rate plus a margin of 0.25% to 0.50%, final maturity April 2021 | Maximum | LIBOR-based borrowings
Debt Instrument [Line Items]
Applicable interest margin rate on the credit facility	1.50%
Other notes payable
Debt Instrument [Line Items]
Total	$ 601,000			$ 493,000	$ 488,000