Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Basic and Diluted Earnings per Share [Line Items]
Net income (loss)	$ (37,241)	$ (2,342)	$ (103,815)	$ 37,983
Weighted-average common shares outstanding, basic (in shares)	25,031,234	25,176,334	25,023,401	25,172,716
Weighted-average common shares outstanding, diluted (in shares)	25,031,234	25,176,334	25,023,401	25,643,744
Earnings (loss) per common share, basic (in dollars per share)	$ (1.49)	$ (0.09)	$ (4.15)	$ 1.51
Earnings (loss) per common share, diluted (in dollars per share)	$ (1.49)	$ (0.09)	$ (4.15)	$ 1.48
Awards excluded from diluted earnings per share calculation (in shares)	820,124	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)	0	0	0	249,605
Stock Options
Basic and Diluted Earnings per Share [Line Items]
Add dilutive effect of share-based awards outstanding (in shares)	0	0	0	221,423