Earnings Per Share - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Basic earnings per share:
Net income	$ 34,509	$ 39,427
Weighted-average basic shares outstanding	43,701,943	42,673,615
Basic earnings per share	$ 0.79	$ 0.92
Diluted earnings per share:
Net income, for diluted earnings per share	$ 34,509	$ 39,427
Weighted-average basic shares outstanding	43,701,943	42,673,615
Add effect of dilutive stock options and restricted stock grants	1,525,593	2,023,235
Total weighted-average diluted shares outstanding	45,227,536	44,696,850
Diluted earnings per share	$ 0.76	$ 0.88
Anti-dilutive shares	172,631