Summary of Capital Expenditures Including Accrued Amounts for Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Total capital expenditures	$ 76,946	$ 171,382	$ 138,202
Owned and managed
Segment Reporting Information [Line Items]
Total capital expenditures	54,681	151,724	120,144
Managed-only
Segment Reporting Information [Line Items]
Total capital expenditures	4,580	8,452	9,745
Corporate and Other
Segment Reporting Information [Line Items]
Total capital expenditures	17,685	10,905	7,822
Discontinued operations
Segment Reporting Information [Line Items]
Total capital expenditures		$ 301	$ 491