Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Basic and Diluted Earnings per Share [Line Items]
Net income (loss)	$ 5,960	$ (4,196)	$ (66,574)	$ 40,325
Weighted-average common shares outstanding, basic (in shares)	25,024,855	25,210,354	25,019,441	25,170,877
Weighted-average common shares outstanding, diluted (in shares)	25,255,604	25,210,354	25,019,441	25,659,803
Earnings (loss) per common share, basic (in dollars per share)	$ 0.24	$ (0.17)	$ (2.66)	$ 1.60
Earnings (loss) per common share, diluted (in dollars per share)	$ 0.24	$ (0.17)	$ (2.66)	$ 1.57
Awards excluded from diluted earnings per share calculation (in shares)	815,279	63,897	515,984	63,897
Restricted Stock Unit Awards
Basic and Diluted Earnings per Share [Line Items]
Add dilutive effect of share-based awards outstanding (in shares)	213,203	0	0	257,810
Stock Options
Basic and Diluted Earnings per Share [Line Items]
Add dilutive effect of share-based awards outstanding (in shares)	17,546	0	0	231,116