Leases - Noncancelable Lease Agreements, Minimum Lease Payments (Detail) $ in Thousands	Dec. 31, 2016 USD ($)
Leases [Line Items]
2017	$ 32,197
2018	26,630
2019	26,127
2020	25,039
2021	20,601
Thereafter	34,838
Total minimum lease payments (receipts)	165,432
2017	(984)
2018	(58)
2019	(59)
2020	(72)
2021	(54)
Total minimum lease payments (receipts)	(1,227)
2017	99,758
2018	113,004
2019	91,251
2020	81,768
2021	64,746
Thereafter	84,260
Total minimum lease payments (receipts)	534,787
Obligations Under Capital Leases [Member]
Leases [Line Items]
2017	64,276
2018	82,163
2019	60,520
2020	51,992
2021	39,390
Thereafter	39,803
Total minimum lease payments (receipts)	338,144
Less amount representing interest	(32,600)
Present value of minimum lease payments	305,544
Unfunded Lease Obligation [Member]
Leases [Line Items]
2017	4,269
2018	4,269
2019	4,663
2020	4,809
2021	4,809
Thereafter	9,619
Total minimum lease payments (receipts)	32,438
Less amount representing interest	(7,677)
Present value of minimum lease payments	$ 24,761