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Earnings Per Common Share - Reconciliation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator for basic and diluted earnings per share:
Net income	$ 5,097	$ 4,558	$ 4,011	$ 10,182	$ 4,546	$ 6,653	$ 13,666	$ 21,381
Add/deduct net loss (income) attributable to non-controlling interests	21			(35)			(465)	(866)
Less earnings allocated to unvested restricted stock	(303)			(342)			(924)	(879)
Net income available for common stockholders: basic and diluted	$ 4,815			$ 9,805			$ 12,277	$ 19,636
Denominator for basic earnings per share:
Weighted average number of common shares	19,191			18,646			19,037	18,521
Effect of diluted securities:
RSUs	48			59			39	41
Denominator for diluted earnings per share:
Weighted average number of shares	19,239			18,705			19,076	18,562
Earnings per common share, basic (in dollars per share)	$ 0.25			$ 0.53			$ 0.64	$ 1.06
Earnings per common share, diluted (in dollars per share)	$ 0.25			$ 0.52			$ 0.64	$ 1.06

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