Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic and Diluted Earnings per Share [Line Items]
Net income from continuing operations	$ 157	$ 109	$ 20,521	$ 18,693
Weighted-average common shares outstanding (in shares)	24,976,563	25,133,035	24,946,335	25,288,068
Weighted-average common shares for EPS calculation (in shares)	25,611,773	25,624,686	25,582,708	25,752,525
Earnings (loss) per common share from continuing operations, basic (in dollars per share)	$ 0.01	$ 0.01	$ 0.82	$ 0.74
Earnings (loss) per common share from continuing operations, diluted (in dollars per share)	0.01	0.01	0.80	0.73
Earnings per common share from discontinued operations, basic (in dollars per share)	0.00	0.11	(0.08)	0.17
Earnings per common share from discontinued operations, diluted (in dollars per share)	0.00	0.11	(0.07)	0.16
Gain on sale of discontinued operations, net of taxes, basic (in dollars per share)			1.10	0.00
Gain on sale of discontinued operations, net of taxes, diluted (in dollars per share)			1.07	0.00
Earnings (loss) per common share, basic (in dollars per share)	0.01	0.12	1.84	0.91
Earnings (loss) per common share, diluted (in dollars per share)	$ 0.01	$ 0.12	$ 1.80	$ 0.89
Awards excluded from diluted earnings per share calculation (in shares)	2,681	0	2,681	0
Restricted Stock Unit Awards
Basic and Diluted Earnings per Share [Line Items]
Add dilutive effect of share-based awards outstanding (in shares)	281,654	248,717	281,654	248,717
Stock Options
Basic and Diluted Earnings per Share [Line Items]
Add dilutive effect of share-based awards outstanding (in shares)	353,556	242,934	354,719	215,740