Summary of Capital Expenditures Including Accrued Amounts for Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Total capital expenditures	$ 107,787	$ 36,801	$ 161,534	$ 64,511
Discontinued operations
Segment Reporting Information [Line Items]
Total capital expenditures				72
Owned and managed
Segment Reporting Information [Line Items]
Total capital expenditures	101,920	33,439	151,391	56,781
Managed-only
Segment Reporting Information [Line Items]
Total capital expenditures	872	756	2,271	2,161
Corporate and Other
Segment Reporting Information [Line Items]
Total capital expenditures	$ 4,995	$ 2,606	$ 7,872	$ 5,497