Schedule of Assets for Reportable Segments (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Total assets	$ 2,968,182	$ 2,974,742
Owned and managed
Segment Reporting Information [Line Items]
Total assets	2,670,007	2,654,791
Managed-only
Segment Reporting Information [Line Items]
Total assets	84,381	109,572
Corporate and Other
Segment Reporting Information [Line Items]
Total assets	213,228	200,760
Discontinued Operations
Segment Reporting Information [Line Items]
Total assets	$ 566	$ 9,619