Schedule of Total Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total assets	$ 3,273,804	$ 3,356,018
Owned and managed
Segment Reporting Information [Line Items]
Total assets	2,914,687	2,966,762
Managed-only
Segment Reporting Information [Line Items]
Total assets	56,462	54,491
Corporate and Other
Segment Reporting Information [Line Items]
Total assets	$ 302,655	$ 334,765