Earnings Per Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Basic
Net income available to common shareholders	$ 25,626	$ 7,949
Less: income attributable to unvested stock-based compensation awards	(186)	(99)
Net earnings allocated to common shareholders	$ 25,440	$ 7,850
Weighted average shares outstanding, including unvested stock-based compensation awards (in shares)	14,912,502	14,904,067
Less: unvested stock-based compensation awards (in shares)	(236,092)	(185,119)
Weighted average shares outstanding - Basic (in shares)	14,676,410	14,718,948
Diluted
Net earnings allocated to common shareholders	$ 25,440	$ 7,850
Weighted average shares outstanding - Basic (in shares)	14,676,410	14,718,948
Plus: Incremental shares from assumed conversion of stock-based compensation awards (in shares)	81,148	55,321
Weighted average shares outstanding - Diluted (in shares)	14,757,558	14,774,269
Basic EPS (in dollars per share)	$ 1.73	$ 0.53
Diluted EPS (in dollars per share)	$ 1.72	$ 0.53