Loans Loans - Non-Accrual Loans, Segregated by Class of Loans and Year of Origination (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	$ 74,987	$ 60,907
Nonperforming Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	5,596
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	23,879
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	4,186
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	8,440
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	570
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	11,348
Financing Receivable, Revolving	8,088
Financing Receivable, Revolving, Converted to Term Loan	12,880
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,208,188
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	719,078
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	667,895
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	391,455
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	321,844
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	342,978
Financing Receivable, Revolving	2,486,421
Non-accrual loans	26,329	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	746
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	3,764
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,159
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,066
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	514
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,197
Financing Receivable, Revolving	2,149
Financing Receivable, Revolving, Converted to Term Loan	12,734
Commercial and Industrial Total Energy Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	304,570
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	36,014
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	55,059
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	50,104
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	4,055
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	10,415
Financing Receivable, Revolving	628,754
Non-accrual loans	9,147	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	4,522
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	3,102
Financing Receivable, Revolving, Converted to Term Loan	146
Commercial Real Estate Buildings Land And Other Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	690,654
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,490,259
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,708,392
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,234,202
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	751,974
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,296,706
Financing Receivable, Revolving	167,257
Non-accrual loans	33,092	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	20,115
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	3,027
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	5,374
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,411
Financing Receivable, Revolving	2,837
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	351,397
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	516,044
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	647,171
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	298,063
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	28,003
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,296
Financing Receivable, Revolving	155,406
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	6,419	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	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	6,419
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted to Term Loan	0
Consumer Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	0	$ 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	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