Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Preferred stock, shares authorized	40,000,000	40,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares outstanding	11,916,309	11,886,003
Noncontrolling interest in consolidated partnership, redemption value	$ 623	$ 435
Series E Preferred Stock [Member]
Preferred stock, annual dividend rate	6.25%	6.25%
Preferred stock, shares authorized	925,000	925,000
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares outstanding	925,000	925,000
Preferred stock, liquidation preference	$ 9,394	$ 9,250