Schedule of Debt Outstanding (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 1,856,060	$ 1,814,795
Unamortized debt issuance costs	(12,498)	(13,119)
Current portion of long-term debt	(15,448)	(14,121)
Long-term debt, net	1,828,114	1,787,555
Term Loan Due in April 2023
Debt Instrument [Line Items]
Total debt	196,250	197,500
Unamortized debt issuance costs	(100)	(100)
Senior Notes 4.625% Due 2023
Debt Instrument [Line Items]
Total debt	350,000	350,000
Unamortized debt issuance costs	(2,600)	(2,700)
Senior Notes 4.125% Due 2020
Debt Instrument [Line Items]
Total debt	325,000	325,000
Unamortized debt issuance costs	(800)	(1,000)
Senior Notes 5.0% Due 2022
Debt Instrument [Line Items]
Total debt	250,000	250,000
Unamortized debt issuance costs	(1,700)	(1,800)
Senior Notes 4.75% Due 2027
Debt Instrument [Line Items]
Total debt	250,000	250,000
Unamortized debt issuance costs	(3,400)	(3,500)
Non-Recourse Mortgage Note 4.5% Due 2033
Debt Instrument [Line Items]
Total debt	23,129	23,429
Unamortized debt issuance costs	(300)	(300)
Non-Recourse Mortgage Note 4.43% Due 2040
Debt Instrument [Line Items]
Total debt	93,472	62,331
Unamortized debt issuance costs	(3,400)	(3,400)
Non-Recourse Mortgage Note 4.5% Due 2034
Debt Instrument [Line Items]
Total debt	154,209	155,535
Unamortized debt issuance costs	(200)	(300)
Revolving Credit Facility | Revolving Credit Facility Due in April 2023
Debt Instrument [Line Items]
Total debt	$ 214,000	$ 201,000