Earnings Per Share - Computation of Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Net income	$ 362	$ (1,196)	$ 4,186	$ 6,154	$ 6,679	$ 6,266	$ 5,732	$ 5,475	$ 9,506	$ 24,152	$ 11,316
Less: Net income attributable to noncontrolling interest	(953)	(951)	(954)	(985)	(909)	(941)	(936)	(944)	(3,843)	(3,730)	(266)
Less: Preferred stock dividends											(13,760)
Net income (loss) attributable to common stockholders	$ (591)	$ (2,147)	$ 3,232	$ 5,169	$ 5,770	$ 5,325	$ 4,796	$ 4,531	5,663	20,422	(2,710)
Less: Allocation to participating securities									(183)	(265)	(182)
Net income (loss) available to common stockholders									$ 5,480	$ 20,157	$ (2,892)
Basic weighted-average common shares									31,597	31,447	15,838
Dilutive potential common shares									4	37
Diluted weighted-average common shares									31,601	31,484	15,838
Earnings (loss) per common share- basic and diluted	$ (0.02)	$ (0.07)	$ 0.10	$ 0.16	$ 0.18	$ 0.17	$ 0.15	$ 0.14	$ 0.17	$ 0.64	$ (0.18)

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.

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The amount of preferred stock dividends that is an adjustment to net income apportioned to common stockholders.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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