Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 58,808	$ 55,039	$ 116,330	$ 106,892
Earnings allocated to participating securities - nonvested restricted shares	0	70	47	227
Earnings allocated to common shareholders, Basic	$ 58,808	$ 54,969	$ 116,283	$ 106,665
Weighted average common shares outstanding	78,049	70,987	77,989	70,924
Basic earnings per common share	$ 0.75	$ 0.77	$ 1.49	$ 1.50
Earnings allocated to common shareholders, Diluted	$ 58,808	$ 54,969	$ 116,283	$ 106,665
Dilutive effect of equity awards	65	177	110	155
Weighted average diluted common shares outstanding	78,114	71,164	78,099	71,079
Diluted earnings per common share	$ 0.75	$ 0.77	$ 1.49	$ 1.50
Potentially dilutive stock awards and units that were not included in the computation of diluted EPS because to do so would be anti-dilutive.	600	248	389	158