Summary of Capital Expenditures Including Accrued Amounts (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Total capital expenditures	$ 22,998	$ 58,658	$ 107,279	$ 223,518
Owned and managed
Segment Reporting Information [Line Items]
Total capital expenditures	17,687	41,775	88,418	195,136
Managed-only
Segment Reporting Information [Line Items]
Total capital expenditures	1,793	1,074	3,134	2,973
Corporate and Other
Segment Reporting Information [Line Items]
Total capital expenditures	$ 3,518	$ 15,809	$ 15,727	$ 25,409