Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Income	$ 64,942	$ 53,017	$ 181,272	$ 159,909
Earnings allocated to participating securities - nonvested restricted shares	0	91	49	317
Earnings allocated to common shareholders, Basic	$ 64,942	$ 52,926	$ 181,223	$ 159,592
Weighted average common shares outstanding	78,100	71,036	78,027	70,965
Basic earnings per common share	$ 0.83	$ 0.75	$ 2.32	$ 2.25
Earnings allocated to common shareholders, Diluted	$ 64,942	$ 52,926	$ 181,223	$ 159,592
Dilutive effect of equity awards	133	150	115	190
Weighted average diluted common shares outstanding	78,233	71,186	78,142	71,155
Diluted earnings per common share	$ 0.83	$ 0.74	$ 2.32	$ 2.24
Potentially dilutive stock awards and units that were not included in the computation of diluted EPS because to do so would be anti-dilutive.	165	269	378	198