Summary of Significant Accounting Policies - Schedule of Reconciliation of Denominators and Additional Shares that are Excluded from the Calculation of EPS (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Weighted-average shares:
Basic weighted-average common shares outstanding	35,862	35,635	35,881
Total weighted-average shares	35,952	35,747	35,981
Earnings per common share—Basic
Net income	$ 181,848	$ 145,384	$ 100,443
Net income available to common shareholders—Basic	$ 181,390	$ 144,925	$ 100,164
Net income per common share—Basic	$ 5.06	$ 4.07	$ 2.79
Basic weighted-average common shares outstanding	35,862	35,635	35,881
Effect of diluted shares	1,835	2,073	1,695
Diluted weighted-average shares outstanding	37,697	37,708	37,576
Net income per common share—Diluted	$ 4.81	$ 3.84	$ 2.67
RSAs
Weighted-average shares:
Basic weighted-average common shares outstanding	90	112	100
Earnings per common share—Basic
Less: Undistributed earnings allocated to RSAs	$ (458)	$ (459)	$ (279)
Basic weighted-average common shares outstanding	90	112	100
Common Stock
Weighted-average shares:
Basic weighted-average common shares outstanding	35,862	35,635	35,881
Earnings per common share—Basic
Basic weighted-average common shares outstanding	35,862	35,635	35,881