Loans Loans - Non-Accrual Loans, Segregated by Class of Loans and Year of Origination (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	$ 29,904	$ 53,713
Nonperforming Financial Instruments [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	6,237
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,493
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,137
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,862
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,729
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,097
Financing Receivable, Revolving	8,213
Financing Receivable, Revolving, Converted to Term Loan	3,136
Commercial Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,251,173
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	739,635
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	544,428
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	261,580
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	152,945
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	211,871
Financing Receivable, Revolving	2,305,283
Non-accrual loans	7,267	22,582
Commercial Portfolio Segment [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	85
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,065
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,245
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,439
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	234
Financing Receivable, Revolving	467
Financing Receivable, Revolving, Converted to Term Loan	732
Commercial and Industrial Total Energy Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	335,500
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	105,443
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	5,728
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	11,366
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	4,235
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,297
Financing Receivable, Revolving	404,598
Non-accrual loans	16,134	14,433
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	5,154
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	72
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,394
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	15
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	7,746
Financing Receivable, Revolving, Converted to Term Loan	1,753
Paycheck Protection Program [Member]
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	0	0
Paycheck Protection Program [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
Commercial Real Estate Buildings Land And Other Loans [Member]
Loans and Leases Receivable Disclosure [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,533,485
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,608,671
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,061,879
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	860,710
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	422,630
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	969,306
Financing Receivable, Revolving	109,368
Non-accrual loans	5,489	15,297
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	1,083
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,408
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	223
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	275
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,500
Financing Receivable, Revolving	0
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	504,958
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	571,022
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	164,362
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	49,302
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	490
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,762
Financing Receivable, Revolving	261,105
Non-accrual loans	0	948
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	1,014	440
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	363
Financing Receivable, Revolving	0
Financing Receivable, Revolving, Converted to Term Loan	651
Consumer Loan [Member]
Loans and Leases Receivable Disclosure [Line Items]
Non-accrual loans	0	$ 13
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