Reconciliation of Debt Issuance Costs and Debt Discounts to the Net Carrying Value for Each Debt Obligation (Excluding Line of Credit Arrangements) (Detail) - USD ($) $ in Thousands	Apr. 22, 2017	Dec. 31, 2016	Sep. 28, 2016	Apr. 03, 2012
Debt Instrument [Line Items]
Face Value	$ 816,250	$ 817,500
Debt issuance costs and debt discount	8,339	8,770
Net carrying value	807,911	808,730
Other Notes Payable
Debt Instrument [Line Items]
Face Value	16,250	17,500
Debt issuance costs and debt discount	528	634
Net carrying value	15,722	16,866
2026 Notes
Debt Instrument [Line Items]
Face Value	400,000	400,000	$ 400,000
Debt issuance costs and debt discount	5,417	5,594
Net carrying value	394,583	394,406
2022 Notes
Debt Instrument [Line Items]
Face Value	400,000	400,000		$ 400,000
Debt issuance costs and debt discount	2,394	2,542
Net carrying value	$ 397,606	$ 397,458