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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Total capital expenditures	$ 16,907	$ 19,907	$ 27,710	$ 41,377
Owned and managed
Segment Reporting Information [Line Items]
Total capital expenditures	15,023	15,834	23,342	29,436
Managed-only
Segment Reporting Information [Line Items]
Total capital expenditures	523	1,765	1,477	2,686
Corporate and Other
Segment Reporting Information [Line Items]
Total capital expenditures	$ 1,361	$ 2,308	$ 2,891	$ 9,255