Schedule of Total Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total assets	$ 3,356,018	$ 3,117,646
Owned and managed
Segment Reporting Information [Line Items]
Total assets	2,966,762	2,745,905
Managed-only
Segment Reporting Information [Line Items]
Total assets	54,491	68,146
Corporate and Other
Segment Reporting Information [Line Items]
Total assets	$ 334,765	$ 303,595