Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Basic and Diluted Earnings per Share [Line Items]
Net income from continuing operations	$ (4,196)	$ 157	$ 40,325	$ 20,521
Weighted-average common shares outstanding, basic (in shares)	25,210,354	24,976,563	25,170,877	24,946,335
Weighted-average common shares outstanding, diluted (in shares)	25,210,354	25,611,773	25,659,803	25,582,708
Earnings (loss) per common share from continuing operations, basic (in dollars per share)	$ (0.17)	$ 0.01	$ 1.60	$ 0.82
Earnings (loss) per common share from continuing operations, diluted (in dollars per share)	(0.17)	0.01	1.57	0.80
Earnings (loss) per common share from discontinued operations, basic (in dollars per share)			0	(0.08)
Earnings (loss) per common share from discontinued operations, diluted (in dollars per share)			0	(0.07)
Gain on sale of discontinued operations, net of taxes, basic (in dollars per share)			0	1.10
Gain on sale of discontinued operations, net of taxes, diluted (in dollars per share)			0	1.07
Earnings per common share, basic (in dollars per share)	(0.17)	0.01	1.60	1.84
Earnings per common share, diluted (in dollars per share)	$ (0.17)	$ 0.01	$ 1.57	$ 1.80
Awards excluded from diluted earnings per share calculation (in shares)	63,897	2,681	63,897	2,681
Restricted Stock Unit Awards
Basic and Diluted Earnings per Share [Line Items]
Add dilutive effect of share-based awards outstanding (in shares)	0	281,654	257,810	281,654
Stock Options
Basic and Diluted Earnings per Share [Line Items]
Add dilutive effect of share-based awards outstanding (in shares)	0	353,556	231,116	354,719