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, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Total capital expenditures	$ 36,801	$ 18,437	$ 64,511	$ 59,814
Owned and managed
Segment Reporting Information [Line Items]
Total capital expenditures	33,439	14,983	56,781	44,419
Managed-only
Segment Reporting Information [Line Items]
Total capital expenditures	756	516	2,161	2,874
Discontinued Operations
Segment Reporting Information [Line Items]
Total capital expenditures		74	72	402
Corporate and Other
Segment Reporting Information [Line Items]
Total capital expenditures	$ 2,606	$ 2,864	$ 5,497	$ 12,119