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Earnings Per Share Earnings Per 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]
Income (Loss) from Continuing Operations Attributable to Parent	$ (2,658)	$ 2,200	$ 2,747	$ 9,356	$ 22,661	$ 3,038	$ 4,410	$ 7,084	$ 11,645	$ 37,193	$ 19,581
Earnings Allocated to Unvested Restricted Stock									(57)	(135)	(89)
Income from Continuing Operations Less Earnings Allocated to Unvested Restricted Stock									$ 11,588	$ 37,058	$ 19,492
Weighted Average Number of Shares Outstanding, Basic									17,971	16,438	16,515
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units									$ 66	$ 336	$ 454
Incremental common shares attributable to dilutive effect of conversion of debt securities									337	941	491
Weighted average number of common and common equivalent shares outstanding for diluted EPS computation									18,374	17,715	17,460
Basic earnings per common share (in dollars per share)	$ (0.14)	$ 0.11	$ 0.15	$ 0.58	$ 1.41	$ 0.18	$ 0.26	$ 0.42	$ 0.64	$ 2.25	$ 1.18
Diluted earnings per common share (in dollars per share)	$ (0.14)	$ 0.11	$ 0.15	$ 0.52	$ 1.31	$ 0.17	$ 0.24	$ 0.39	$ 0.63	$ 2.09	$ 1.12

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