Earnings Per Share - Schedule of Earnings Per Share - Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Diluted
Net Income									$ 46,077	$ 41,347	$ 66,244
Weighted average common shares outstanding – Basic (in shares)									28,048,726	28,122,288	30,172,050
Dilutive effect of unvested equity awards (in shares)									108,336	776,548	806,241
Weighted average common shares outstanding – Diluted (in shares)									28,157,062	28,898,836	30,978,291
EPS – Diluted (in dollars per share)	$ 0.94	$ (0.02)	$ 0.41	$ 0.31	$ (0.08)	$ 0.28	$ 0.53	$ 0.68	$ 1.64	$ 1.43	$ 2.14