Schedule of Total Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Total assets	$ 3,127,191	$ 3,007,425
Owned and managed
Segment Reporting Information [Line Items]
Total assets	2,745,905	2,715,719
Managed-only
Segment Reporting Information [Line Items]
Total assets	68,146	81,551
Corporate and Other
Segment Reporting Information [Line Items]
Total assets	313,140	210,140
Discontinued operations
Segment Reporting Information [Line Items]
Total assets		$ 15