Fee and Other Income - Schedule of Fee and Other Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Fee income
Property management fees	$ 6,336	$ 5,948	$ 5,763
Asset management fee income	8,581	7,754
Acquisition and disposition	7,770	2,026	1,760
Other fees	1,525	1,203	2,725
Total fee income	24,212	16,931	10,248
Lease termination income	2,189	17,010	871
Other income	11,265	14,296	13,874
Total fee and other income	$ 37,666	$ 48,237	$ 24,993