Fee and Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Fee And Other Income [Line Items]
BMS cleaning fees	$ 20,820	$ 18,563	$ 57,760	$ 62,937
Management and leasing fees	6,644	4,045	16,047	12,511
Lease termination fees	2,118	1,517	7,722	8,157
Other income	8,192	10,036	23,904	29,393
Fee and other income	37,774	34,161	105,433	112,998
Interstate Properties
Fee And Other Income [Line Items]
Management and leasing fees	$ 128	$ 132	$ 390	$ 403