Schedule of Total Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Total assets	$ 3,285,512	$ 3,356,018
Owned and managed
Segment Reporting Information [Line Items]
Total assets	2,850,434	2,966,762
Managed-only
Segment Reporting Information [Line Items]
Total assets	62,693	54,491
Corporate and Other
Segment Reporting Information [Line Items]
Total assets	$ 372,385	$ 334,765