CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Thousands	Total	Total Stockholders’ Equity	Preferred Stock	Common Stock	Additional Paid-in Capital	Cumulative Distributions in Excess of Earnings	Accumulated Other Comprehensive Income	Noncontrolling Interests	Common Stock	Common Stock Total Stockholders’ Equity	Common Stock Common Stock	Common Stock Additional Paid-in Capital
Beginning Balance at Dec. 31, 2015	$ 693,744	$ 672,139	$ 0	$ 553	$ 722,722	$ (48,103)	$ (3,033)	$ 21,605
Beginning Balance, shares at Dec. 31, 2015				55,598,684
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Share-based compensation	966	468		$ 1	467			498
Share-based compensation, shares				65,529
Shares acquired to satisfy employee tax withholding requirements on vesting restricted stock	(115)	(115)			(115)
Shares acquired to satisfy employee tax withholding requirements on vesting restricted stock, shares				(6,785)
Net income	1,477	1,425				1,425		52
Other comprehensive loss	(1,757)	(1,695)					(1,695)	(62)
Common stock dividends	(7,514)	(7,514)				(7,514)
Distributions	(300)							(300)
Ending Balance at Mar. 31, 2016	686,501	664,708	0	$ 554	723,074	(54,192)	(4,728)	21,793
Ending Balance, shares at Mar. 31, 2016				55,657,428
Beginning Balance at Dec. 31, 2016	$ 962,140	939,315	86,651	$ 662	907,834	(59,277)	3,445	22,825
Beginning Balance, shares at Dec. 31, 2016	66,454,375			66,454,375
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of stock									$ 3,906	$ 3,906	$ 1	$ 3,905
Issuance of common stock, shares											168,685
Offering costs	$ (166)	(166)	0		(166)
Share-based compensation	1,396	563		$ 1	562			833
Share-based compensation, shares				78,829
Shares acquired to satisfy employee tax withholding requirements on vesting restricted stock	(277)	(277)			(277)
Shares acquired to satisfy employee tax withholding requirements on vesting restricted stock, shares				(11,989)
Conversion of units to common stock	200	189		$ 0	189			(189)
Conversion of units to common stock, shares				18,852
Net income	5,721	5,589	1,322			4,267		132
Other comprehensive loss	752	731					731	21
Preferred stock dividends	(1,322)	(1,322)	(1,322)
Common stock dividends	(9,672)	(9,672)				(9,672)
Distributions	(336)							(336)
Ending Balance at Mar. 31, 2017	$ 962,142	$ 938,856	$ 86,651	$ 664	$ 912,047	$ (64,682)	$ 4,176	$ 23,286
Ending Balance, shares at Mar. 31, 2017	66,708,752			66,708,752