Summary of Capital Expenditures Including Accrued Amounts for Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting Information [Line Items]
Total capital expenditures	$ 19,907	$ 23,969	$ 41,377	$ 37,517
Owned and managed
Segment Reporting Information [Line Items]
Total capital expenditures	15,495	20,192	29,086	31,483
Managed-only
Segment Reporting Information [Line Items]
Total capital expenditures	2,104	1,622	3,036	2,472
Discontinued operations
Segment Reporting Information [Line Items]
Total capital expenditures		110		163
Corporate and Other
Segment Reporting Information [Line Items]
Total capital expenditures	$ 2,308	$ 2,045	$ 9,255	$ 3,399