Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Net interest income	$ 141,029	$ 139,904	$ 273,859	$ 277,499
Provision for credit losses	19,729	8,456	27,245	9,458
Noninterest income (loss)	(141,286)	37,829	(101,931)	74,907
Noninterest expense	118,326	121,621	237,990	239,210
Income (Loss) From Continuing Operations Before Income Taxes	(138,312)	47,656	(93,307)	103,738
Income taxes	(37,707)	6,452	(30,875)	14,889
Income (Loss) From Continuing Operations	(100,605)	41,204	(62,432)	88,849
Selected Financial Information
Total assets	18,452,487		18,452,487		$ 18,722,189
Depreciation and amortization			18,687	16,448
Continuing Operations [Member]
Selected Financial Information
Total assets	18,452,487	18,344,869	18,452,487	18,344,869
Depreciation and amortization	10,039	8,637	18,468	16,149
General Banking [Member]
Segment Reporting Information [Line Items]
Net interest income	139,533	138,375	271,047	274,531
Provision for credit losses	19,732	8,435	27,080	9,369
Noninterest income (loss)	(150,996)	28,995	(120,598)	57,354
Noninterest expense	110,005	113,660	221,678	223,215
Income (Loss) From Continuing Operations Before Income Taxes	(141,200)	45,275	(98,309)	99,301
Income taxes	(38,429)	5,855	(32,120)	13,779
Income (Loss) From Continuing Operations	(102,771)	39,420	(66,189)	85,522
Selected Financial Information
Total assets	18,272,094	18,138,313	18,272,094	18,138,313
Depreciation and amortization	9,975	8,570	18,342	16,013
Wealth Management [Member]
Segment Reporting Information [Line Items]
Net interest income	1,496	1,529	2,812	2,968
Provision for credit losses	(3)	21	165	89
Noninterest income (loss)	9,710	8,834	18,667	17,553
Noninterest expense	8,321	7,961	16,312	15,995
Income (Loss) From Continuing Operations Before Income Taxes	2,888	2,381	5,002	4,437
Income taxes	722	597	1,245	1,110
Income (Loss) From Continuing Operations	2,166	1,784	3,757	3,327
Selected Financial Information
Total assets	180,393	206,556	180,393	206,556
Depreciation and amortization	$ 64	$ 67	$ 126	$ 136