Summary of Capital Expenditures Including Accrued Amounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total capital expenditures	$ 134,531	$ 415,441	$ 262,560
Owned and managed
Segment Reporting Information [Line Items]
Total capital expenditures	108,241	382,781	246,333
Managed-only
Segment Reporting Information [Line Items]
Total capital expenditures	5,749	4,049	3,171
Corporate and Other
Segment Reporting Information [Line Items]
Total capital expenditures	$ 20,541	$ 28,611	$ 13,056