Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands	Total	Series B Preferred Stock	Common Stock	Additional Paid-In Capital	Retained Earnings	Dividends Declared	Accum. Other comprehensive income	Non-Controlling Interest
Balance at Dec. 31, 2015	$ 271,245	$ 1	$ 109	$ 273,740	$ 12,724	$ (19,876)		$ 4,547
Balance (in shares) at Dec. 31, 2015		125	11,233
Redemption of stock	(125,125)	$ (1)		(125,124)
Redemption of stock (in shares)		(125)
Grants of restricted stock (in shares)			89
Issuance of stock, net of costs	221,649		$ 205	221,444
Issuance of stock, net of costs (in shares)			20,435
Distributions to noncontrolling interest	(2,307)							(2,307)
Stock-based compensation	2,555			2,555
Net income	11,316				11,050			266
Dividends to preferred stockholders	(13,760)					(13,760)
Dividends to common stockholders	(7,315)					(7,315)
Balance at Dec. 31, 2016	358,258		$ 314	372,615	23,774	(40,951)		2,506
Balance (in shares) at Dec. 31, 2016			31,757
Grants of restricted stock (in shares)			115
Issuance of stock, net of costs	(20)			(20)
Repurchase and cancellation of restricted stock	(50)			(50)
Repurchase and cancellation of restricted stock (in shares)			(5)
Retirement of common stock (in shares)			(11)
Shares surrendered for taxes upon vesting	(242)			(242)
Shares surrendered for taxes upon vesting (in shares)			(20)
Other comprehensive income	1,247						$ 1,247
Distributions to noncontrolling interest	(3,239)							(3,239)
Stock-based compensation	3,387			3,387
Net income	24,152				20,422			3,730
Dividends to common stockholders	(26,740)					(26,740)
Balance at Dec. 31, 2017	356,753		$ 314	375,690	44,196	(67,691)	1,247	2,997
Balance (in shares) at Dec. 31, 2017			31,836
Grants of restricted stock (in shares)			46
Forfeited restricted stock (in shares)			(12)
Vesting of restricted stock units (in shares)			8
Shares surrendered for taxes upon vesting	(379)			(379)
Shares surrendered for taxes upon vesting (in shares)			(37)
Other comprehensive income	964						964
Distributions to noncontrolling interest	(2,934)							(2,934)
Stock-based compensation	3,405			3,405
Net income	9,506				5,663			3,843
Dividends to common stockholders	(19,955)					(19,955)
Balance at Dec. 31, 2018	$ 347,360		$ 314	$ 378,716	$ 49,859	$ (87,646)	$ 2,211	$ 3,906
Balance (in shares) at Dec. 31, 2018			31,841