Net Income Per Common Share - Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Basic
Net income applicable to common stock	$ 33,547	$ 57,908
Average common shares outstanding (shares)	55,809,192	56,240,201
Net income per common share - basic (usd per share)	$ 0.60	$ 1.03
Diluted
Net income applicable to common stock	$ 33,547	$ 57,908
Average common shares outstanding (shares)	55,809,192	56,240,201
Effect of dilutive stock-based compensation (shares)	272,671	278,998
Average common shares outstanding - diluted (shares)	56,081,863	56,519,199
Net income per common share - diluted (usd per share)	$ 0.60	$ 1.02