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Earnings Per Share (Schedule of Earnings Per Share Reconciliation) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net income (loss)	$ (1,096)	$ (4,005)	$ 16,528	$ (2,135)	$ (19,637)	$ (1,036)	$ (534)	$ (4,014)	$ 9,292	$ (25,221)
Less: dividends to participating securities										142
Net income (loss) available to common shareholders									$ 9,292	$ (25,363)
Shares (Denominator)
Weighted average common shares outstanding (basic and diluted)									21,546,257	21,747,633
Income (Loss) Per Share
Basic and diluted	$ (0.05)	$ (0.19)	$ 0.77	$ (0.10)	$ (0.91)	$ (0.05)	$ (0.03)	$ (0.19)	$ 0.43	$ (1.17)