CONSOLIDATED STATEMENTS OF EQUITY (unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Preferred Stock	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance ( in shares) at Dec. 31, 2022		19,980	10,801
Beginning balance at Dec. 31, 2022	$ 1,271,958	$ 484,531	$ 10,801	$ 128,939	$ (50,843)	$ 698,530
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	47,035					47,035
Other comprehensive income (loss) net of tax	(9,019)				(9,019)
Cash dividends, preferred stock	(6,791)					(6,791)
Cash dividends, common stock	(11,882)					(11,882)
Issuance of Class C Common Stock (in shares)			19
Issuance of Class C Common Stock	70		$ 19	51
Stock-based compensation cost	2,254			2,254
Other stock-based award activity	(1,240)			(1,240)
Ending balance (in shares) at Mar. 31, 2023		19,980	10,820
Ending balance at Mar. 31, 2023	1,292,385	$ 484,531	$ 10,820	130,004	(59,862)	726,892
Beginning balance ( in shares) at Dec. 31, 2022		19,980	10,801
Beginning balance at Dec. 31, 2022	1,271,958	$ 484,531	$ 10,801	128,939	(50,843)	698,530
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	152,384
Other comprehensive income (loss) net of tax	15,004				15,004
Loss on retirement of preferred stock	0
Ending balance (in shares) at Sep. 30, 2023		19,980	10,840
Ending balance at Sep. 30, 2023	1,385,267	$ 484,531	$ 10,840	130,921	(35,839)	794,814
Beginning balance ( in shares) at Mar. 31, 2023		19,980	10,820
Beginning balance at Mar. 31, 2023	1,292,385	$ 484,531	$ 10,820	130,004	(59,862)	726,892
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	47,212					47,212
Other comprehensive income (loss) net of tax	25,511				25,511
Cash dividends, preferred stock	(6,791)					(6,791)
Cash dividends, common stock	(11,921)					(11,921)
Issuance of Class C Common Stock (in shares)			16
Issuance of Class C Common Stock	70		$ 16	54
Stock-based compensation cost	1,223			1,223
Other stock-based award activity	(1,134)			(1,134)
Ending balance (in shares) at Jun. 30, 2023		19,980	10,836
Ending balance at Jun. 30, 2023	1,346,555	$ 484,531	$ 10,836	130,147	(34,351)	755,392
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	58,137					58,137
Other comprehensive income (loss) net of tax	(1,488)				(1,488)
Cash dividends, preferred stock	(6,792)					(6,792)
Cash dividends, common stock	(11,923)					(11,923)
Loss on retirement of preferred stock	0
Issuance of Class C Common Stock (in shares)			4
Issuance of Class C Common Stock	68		$ 4	64
Stock-based compensation cost	1,221			1,221
Other stock-based award activity	(511)			(511)
Ending balance (in shares) at Sep. 30, 2023		19,980	10,840
Ending balance at Sep. 30, 2023	1,385,267	$ 484,531	$ 10,840	130,921	(35,839)	794,814
Beginning balance ( in shares) at Dec. 31, 2023		19,980	10,842
Beginning balance at Dec. 31, 2023	1,411,863	$ 484,531	$ 10,842	132,919	(40,145)	823,716
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	53,746					53,746
Other comprehensive income (loss) net of tax	36,027				36,027
Cash dividends, preferred stock	(6,791)					(6,791)
Cash dividends, common stock	(15,186)					(15,186)
Issuance of Class C Common Stock (in shares)			27
Issuance of Class C Common Stock	91		$ 27	64
Stock-based compensation cost	3,483			3,483
Other stock-based award activity	(2,890)			(2,890)
Ending balance (in shares) at Mar. 31, 2024		19,980	10,869
Ending balance at Mar. 31, 2024	1,480,343	$ 484,531	$ 10,869	133,576	(4,118)	855,485
Beginning balance ( in shares) at Dec. 31, 2023		19,980	10,842
Beginning balance at Dec. 31, 2023	1,411,863	$ 484,531	$ 10,842	132,919	(40,145)	823,716
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	150,679
Other comprehensive income (loss) net of tax	37,591				37,591
Loss on retirement of preferred stock	(1,619)
Ending balance (in shares) at Sep. 30, 2024		16,980	10,885
Ending balance at Sep. 30, 2024	1,462,344	$ 411,149	$ 10,885	135,225	(2,554)	907,639
Beginning balance ( in shares) at Mar. 31, 2024		19,980	10,869
Beginning balance at Mar. 31, 2024	1,480,343	$ 484,531	$ 10,869	133,576	(4,118)	855,485
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	47,105					47,105
Other comprehensive income (loss) net of tax	(5,023)				(5,023)
Cash dividends, preferred stock	(6,792)					(6,792)
Cash dividends, common stock	(15,233)					(15,233)
Issuance of Class C Common Stock (in shares)			12
Issuance of Class C Common Stock	79		$ 12	67
Stock-based compensation cost	1,555			1,555
Other stock-based award activity	(1,055)			(1,055)
Ending balance (in shares) at Jun. 30, 2024		19,980	10,881
Ending balance at Jun. 30, 2024	1,500,979	$ 484,531	$ 10,881	134,143	(9,141)	880,565
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	49,828					49,828
Other comprehensive income (loss) net of tax	6,587				6,587
Cash dividends, preferred stock	(5,897)					(5,897)
Cash dividends, common stock	(15,238)					(15,238)
Redemption of Series C preferred stock (in shares)		(3,000)
Redemption of Series C preferred stock	(73,382)	$ (73,382)
Loss on retirement of preferred stock	(1,619)					(1,619)
Issuance of Class C Common Stock (in shares)			4
Issuance of Class C Common Stock	82		$ 4	78
Stock-based compensation cost	1,490			1,490
Other stock-based award activity	(486)			(486)
Ending balance (in shares) at Sep. 30, 2024		16,980	10,885
Ending balance at Sep. 30, 2024	$ 1,462,344	$ 411,149	$ 10,885	$ 135,225	$ (2,554)	$ 907,639