Loans Loans - Non-Accrual Loans, Segregated by Class of Loans and Year of Origination (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	$ 104,877	$ 60,907
Nonperforming Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	27,170
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	22,063
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	15,246
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	5,330
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,834
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	7,344
Financing Receivable, Revolving	6,643
Financing Receivable, Revolving, Converted to Term Loan	19,247
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,213,266
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	645,575
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	596,772
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	335,508
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	303,937
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	318,214
Financing Receivable, Revolving	2,342,671
Non-accrual loans	51,059	19,545
Commercial Portfolio Segment [Member] | Nonperforming Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	22,756
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,822
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	4,335
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	2,088
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	494
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,171
Financing Receivable, Revolving	730
Financing Receivable, Revolving, Converted to Term Loan	15,663
Commercial and Industrial Total Energy Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	329,675
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	26,287
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	52,657
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	45,169
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,488
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	9,365
Financing Receivable, Revolving	596,664
Non-accrual loans	8,165	11,500
Commercial and Industrial Total Energy Loans [Member] | Nonperforming Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	4,086
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	56
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,321
Financing Receivable, Revolving	2,702
Financing Receivable, Revolving, Converted to Term Loan	0
Commercial Real Estate Buildings Land And Other Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,028,255
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,458,787
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,637,773
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,174,145
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	724,347
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,161,426
Financing Receivable, Revolving	133,265
Non-accrual loans	38,908	22,420
Commercial Real Estate Buildings Land And Other Loans [Member] | Nonperforming Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	328
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	18,867
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	10,911
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,242
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,248
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,594
Financing Receivable, Revolving	2,718
Financing Receivable, Revolving, Converted to Term Loan	0
Construction Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	573,431
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	578,682
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	605,020
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	279,883
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	27,978
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	711
Financing Receivable, Revolving	239,389
Non-accrual loans	0	0
Construction Loans [Member] | Nonperforming Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted to Term Loan	0
Total consumer real estate loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	6,371	7,442
Total consumer real estate loans [Member] | Nonperforming Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	36
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,258
Financing Receivable, Revolving	493
Financing Receivable, Revolving, Converted to Term Loan	3,584
Consumer Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	374	$ 0
Consumer Loan [Member] | Nonperforming Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	374
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted to Term Loan	$ 0