Earnings Per Share (Details) $ / shares in Units, $ in Thousands			3 Months Ended		9 Months Ended
		Jan. 17, 2022	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 30, 2021 USD ($) $ / shares shares
Net Income
Net income | $			$ 58,488	$ 58,503	$ 162,565	$ 171,903
Dividends on preferred stock | $			(5,729)	(5,729)	(17,186)	(15,145)
Net Income Allocated to Common Shareholders | $			$ 52,759	$ 52,774	$ 145,379	$ 156,758
Weighted-Average Shares
Weighted average shares - Basic | shares	[1]		43,107,975	43,176,296	43,182,380	43,169,618
Effect of dilutive securities-restricted stock awards | shares			150,950	138,459	148,768	131,070
Weighted average shares - diluted | shares	[1]		43,258,925	43,314,755	43,331,148	43,300,688
Per Share Amount
Basic earnings per share(1) | $ / shares	[1]		$ 1.22	$ 1.22	$ 3.37	$ 3.63
Diluted earnings per share(1) | $ / shares	[1]		$ 1.22	$ 1.22	$ 3.36	$ 3.62
Other disclosures
Stock split ratio		1.5

[1] The number of shares and per share amounts have been restated to reflect the 3-for-2 common stock split, effective on January 17, 2022