Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Net interest income	$ 154,714	$ 138,637	$ 428,573	$ 416,136
Provision for credit losses	6,548	8,426	33,793	17,884
Noninterest income (loss)	37,562	36,921	(64,369)	111,828
Noninterest expense	123,270	130,291	361,260	369,501
Income (Loss) From Continuing Operations Before Income Taxes	62,458	36,841	(30,849)	140,579
Income taxes	11,128	6,288	(19,747)	21,177
Income (Loss) From Continuing Operations	51,330	30,553	(11,102)	119,402
Selected Financial Information
Total assets	18,480,372		18,480,372		$ 18,722,189
Depreciation and amortization			28,405	26,129
Continuing Operations [Member]
Selected Financial Information
Total assets	18,480,372	18,321,164	18,480,372	18,321,164
Depreciation and amortization	9,718	9,546	28,186	25,695
General Banking [Member]
Segment Reporting Information [Line Items]
Net interest income	153,189	137,143	424,236	411,674
Provision for credit losses	6,551	10,646	33,631	20,015
Noninterest income (loss)	28,222	28,181	(92,376)	85,535
Noninterest expense	115,157	122,010	336,835	345,225
Income (Loss) From Continuing Operations Before Income Taxes	59,703	32,668	(38,606)	131,969
Income taxes	10,445	5,245	(21,675)	19,024
Income (Loss) From Continuing Operations	49,258	27,423	(16,931)	112,945
Selected Financial Information
Total assets	18,282,757	18,126,327	18,282,757	18,126,327
Depreciation and amortization	9,656	9,483	27,998	25,496
Wealth Management [Member]
Segment Reporting Information [Line Items]
Net interest income	1,525	1,494	4,337	4,462
Provision for credit losses	(3)	(2,220)	162	(2,131)
Noninterest income (loss)	9,340	8,740	28,007	26,293
Noninterest expense	8,113	8,281	24,425	24,276
Income (Loss) From Continuing Operations Before Income Taxes	2,755	4,173	7,757	8,610
Income taxes	683	1,043	1,928	2,153
Income (Loss) From Continuing Operations	2,072	3,130	5,829	6,457
Selected Financial Information
Total assets	197,615	194,837	197,615	194,837
Depreciation and amortization	$ 62	$ 63	$ 188	$ 199