Summary of Capital Expenditures Including Accrued Amounts (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Total capital expenditures	$ 12,927	$ 91,179
Owned and managed
Segment Reporting Information [Line Items]
Total capital expenditures	11,278	82,834
Managed-only
Segment Reporting Information [Line Items]
Total capital expenditures	655	731
Corporate and Other
Segment Reporting Information [Line Items]
Total capital expenditures	$ 994	$ 7,614