Earnings Per Share - Schedule of Earnings Per 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
Earnings Per Share [Abstract]
Net income available to common shareholders	$ 5,732	$ 20,864	$ 9,565	$ 35,654
Weighted average common shares outstanding (for basic calculation) (in shares)	44,506,874	45,058,226	44,557,103	46,040,027
Dilutive effect of outstanding common stock options and RSUs (in shares)	702,822	445,939	825,584	435,326
Weighted average common dilutive shares outstanding (for diluted calculation) (in shares)	45,209,696	45,504,165	45,382,687	46,475,353
Net income per common share – basic (in dollars per share)	$ 0.13	$ 0.46	$ 0.21	$ 0.77
Net income per common share – diluted (in dollars per share)	$ 0.13	$ 0.46	$ 0.21	$ 0.77