CONSOLIDATED STATEMENTS OF EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Total Stockholders’ Equity	Common Stock [Member]	Additional Paid-in Capital [Member]	Cumulative Distributions and Net Losses [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interest
Balance, shares at Dec. 31, 2015			177,943,238
Balance, value at Dec. 31, 2015	$ 1,286,832	$ 1,286,832	$ 1,779	$ 1,571,107	$ (281,825)	$ (4,229)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	763	763			763
Other comprehensive income	1,931	1,931				1,931
Issuance of common stock, shares			6,485,383
Issuance of common stock, value	61,871	61,871	$ 65	61,806
Transfers to redeemable common stock	(6,504)	(6,504)		(6,504)
Redemptions of common stock, shares			(3,538,049)
Redemptions of common stock, value	(34,767)	(34,767)	$ (35)	(34,732)
Distributions declared	(117,025)	(117,025)			(117,025)
Other offering costs	(25)	(25)		(25)
Noncontrolling interest contribution	$ 300						300
Balance, shares at Dec. 31, 2016	180,890,572		180,890,572.000
Balance, value at Dec. 31, 2016	$ 1,193,076	1,193,076	$ 1,809	1,591,652	(398,087)	(2,298)	300
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,193,376
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,986	4,986			4,986
Other comprehensive income	1,619	1,619				1,619
Issuance of common stock, shares			1,483,839
Issuance of common stock, value	14,987	14,987	$ 15	14,972
Transfers to redeemable common stock	(2,456)	(2,456)		(2,456)
Redemptions of common stock, shares			(1,200,935)
Redemptions of common stock, value	(12,530)	(12,530)	$ (12)	(12,518)
Distributions declared	(29,080)	(29,080)			(29,080)
Other offering costs	$ (1)	(1)		(1)
Balance, shares at Mar. 31, 2017	181,173,476		181,173,476.000
Balance, value at Mar. 31, 2017	$ 1,170,601	$ 1,170,601	$ 1,812	$ 1,591,649	$ (422,181)	$ (679)	$ 300
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,170,901