Revenues Revenue Recognition by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disaggregation of Revenue [Line Items]
Noninterest Income	$ 286,400	$ (9,407)	$ 63,182
Fiduciary and Trust [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	96,579	92,569	82,502
Deposit Account [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	53,649	51,642	49,045
Operating Segments [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	206,318	199,518	186,560
Noninterest Income, Outside of Scope of Topic 606	80,082	(208,925)	(123,377)
Noninterest Income	286,400	(9,407)	63,182
Operating Segments [Member] | Fiduciary and Trust [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	96,579	92,569	82,502
Operating Segments [Member] | Deposit Account [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	53,649	51,642	49,045
Operating Segments [Member] | Credit and Debit Card [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	46,736	47,027	45,121
Operating Segments [Member] | Financial Service, Other [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	9,354	8,280	9,891
Operating Segments [Member] | Corporate and Commercial Specialty [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	14,326	13,594	12,498
Noninterest Income, Outside of Scope of Topic 606	47,599	39,841	39,407
Noninterest Income	61,925	53,435	51,905
Operating Segments [Member] | Corporate and Commercial Specialty [Member] | Fiduciary and Trust [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	0	0	0
Operating Segments [Member] | Corporate and Commercial Specialty [Member] | Deposit Account [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	12,853	11,627	10,191
Operating Segments [Member] | Corporate and Commercial Specialty [Member] | Credit and Debit Card [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	648	1,652	1,348
Operating Segments [Member] | Corporate and Commercial Specialty [Member] | Financial Service, Other [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	825	315	959
Operating Segments [Member] | Community, Consumer and Business [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	193,093	185,936	173,246
Noninterest Income, Outside of Scope of Topic 606	16,358	12,549	20,702
Noninterest Income	209,451	198,485	193,948
Operating Segments [Member] | Community, Consumer and Business [Member] | Fiduciary and Trust [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	96,579	92,569	82,502
Operating Segments [Member] | Community, Consumer and Business [Member] | Deposit Account [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	40,761	39,977	38,831
Operating Segments [Member] | Community, Consumer and Business [Member] | Credit and Debit Card [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	47,456	45,287	43,745
Operating Segments [Member] | Community, Consumer and Business [Member] | Financial Service, Other [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	8,297	8,103	8,168
Operating Segments [Member] | Risk Management and Shared Services [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	(1,101)	(12)	815
Noninterest Income, Outside of Scope of Topic 606	16,125	(261,315)	(183,486)
Noninterest Income	15,024	(261,327)	(182,671)
Operating Segments [Member] | Risk Management and Shared Services [Member] | Fiduciary and Trust [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	0	0	0
Operating Segments [Member] | Risk Management and Shared Services [Member] | Deposit Account [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	35	38	23
Operating Segments [Member] | Risk Management and Shared Services [Member] | Credit and Debit Card [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	(1,368)	88	28
Operating Segments [Member] | Risk Management and Shared Services [Member] | Financial Service, Other [Member]
Disaggregation of Revenue [Line Items]
Noninterest Income In Scope of Topic 606	$ 232	$ (138)	$ 764