Consolidated and Combined Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
REVENUE
Property rentals	$ 436,625	$ 401,595	$ 389,810
Tenant reimbursements	37,985	37,661	40,476
Third-party real estate services, including reimbursements	63,236	33,882	29,467
Other income	5,167	5,381	10,854
Total revenue	543,013	478,519	470,607
EXPENSES
Depreciation and amortization	161,659	133,343	144,984
Property operating	111,055	100,304	101,511
Real estate taxes	66,434	57,784	58,874
General and administrative:
Corporate and other	47,131	48,753	44,424
Third-party real estate services	51,919	19,066	18,217
Share-based compensation related to Formation Transaction	29,251	0	0
Transaction and other costs	127,739	6,476	0
Total operating expenses	595,188	365,726	368,010
OPERATING INCOME (LOSS)	(52,175)	112,793	102,597
Loss from unconsolidated real estate ventures, net	(4,143)	(947)	(4,283)
Interest and other income, net	1,788	2,992	2,557
Interest expense	(58,141)	(51,781)	(50,823)
Loss on extinguishment of debt	(701)	0	0
Gain on bargain purchase	24,376	0	0
INCOME (LOSS) BEFORE INCOME TAX BENEFIT (EXPENSE)	(88,996)	63,057	50,048
Income tax benefit (expense)	9,912	(1,083)	(420)
NET INCOME (LOSS)	(79,084)	61,974	49,628
Net loss attributable to redeemable noncontrolling interests	7,328	0	0
Net loss attributable to noncontrolling interest	3	0	0
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ (71,753)	$ 61,974	$ 49,628
EARNINGS (LOSS) PER COMMON SHARE:
Basic (in dollars per share)	$ (0.70)	$ 0.62	$ 0.49
Diluted (in dollars per share)	$ (0.70)	$ 0.62	$ 0.49
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING - basic and diluted (in shares)	105,359	100,571	100,571
DIVIDENDS DECLARED PER COMMON SHARE (in dollars pre share)	$ 0.45	$ 0	$ 0