Summary of Capital Expenditures Including Accrued Amounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total capital expenditures	$ 415,441	$ 262,560	$ 111,618
Discontinued operations
Segment Reporting Information [Line Items]
Total capital expenditures			72
Owned and managed
Segment Reporting Information [Line Items]
Total capital expenditures	382,781	246,333	96,975
Managed-only
Segment Reporting Information [Line Items]
Total capital expenditures	4,049	3,171	3,719
Corporate and Other
Segment Reporting Information [Line Items]
Total capital expenditures	$ 28,611	$ 13,056	$ 10,852