Loans Loans - Weighted Average Risk Grade for All Commercial Loans by Class and Year of Origination (Details) $ in Thousands	Mar. 31, 2024 USD ($) Grade	Dec. 31, 2023 USD ($) Grade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 19,388,206	$ 18,824,251
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	878,780
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	873,069
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	710,133
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	462,165
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	346,689
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	372,114
Financing Receivable, Revolving	2,386,818
Loans and Leases Receivable, Net of Deferred Income	$ 6,108,136	$ 5,967,182
Weighted Average Risk Grade For Loans | Grade	6.67	6.60
Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 227,603
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	35,251
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	58,965
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	70,932
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	4,612
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	10,951
Financing Receivable, Revolving	521,034
Loans and Leases Receivable, Net of Deferred Income	$ 937,880	$ 936,737
Weighted Average Risk Grade For Loans | Grade	6.00	6.05
Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 408,729
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,560,879
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,745,471
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,302,714
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	798,561
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,390,645
Financing Receivable, Revolving	243,671
Loans and Leases Receivable, Net of Deferred Income	$ 7,548,222	$ 7,301,920
Weighted Average Risk Grade For Loans | Grade	7.26	7.20
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 242,949
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	440,037
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	598,799
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	289,714
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	28,028
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,353
Financing Receivable, Revolving	171,536
Loans and Leases Receivable, Net of Deferred Income	$ 1,772,416	$ 1,680,724
Weighted Average Risk Grade For Loans | Grade	7.56	7.45
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 651,678
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,000,916
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,344,270
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,592,428
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	826,589
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,391,998
Financing Receivable, Revolving	415,207
Loans and Leases Receivable, Net of Deferred Income	$ 9,320,638	$ 8,982,644
Weighted Average Risk Grade For Loans | Grade	7.32	7.24
Risk Grade One To Eight [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 788,259
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	799,207
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	640,565
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	413,197
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	331,143
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	343,646
Financing Receivable, Revolving	2,103,487
Loans and Leases Receivable, Net of Deferred Income	$ 5,469,589	$ 5,507,878
Weighted Average Risk Grade For Loans | Grade	6.28	6.32
Risk Grade One To Eight [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 222,335
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	32,898
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	53,057
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	69,990
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	4,467
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	5,496
Financing Receivable, Revolving	480,392
Loans and Leases Receivable, Net of Deferred Income	$ 876,532	$ 871,221
Weighted Average Risk Grade For Loans | Grade	5.69	5.73
Risk Grade One To Eight [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 408,058
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,515,706
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,569,318
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,195,050
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	726,365
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,285,229
Financing Receivable, Revolving	128,573
Loans and Leases Receivable, Net of Deferred Income	$ 6,925,310	$ 6,895,358
Weighted Average Risk Grade For Loans | Grade	7.04	7.03
Risk Grade One To Eight [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 227,895
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	433,679
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	520,522
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	187,481
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	28,028
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,353
Financing Receivable, Revolving	166,140
Loans and Leases Receivable, Net of Deferred Income	$ 1,565,098	$ 1,526,086
Weighted Average Risk Grade For Loans | Grade	7.29	7.27
Risk Grade One To Eight [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income		$ 8,421,444
Weighted Average Risk Grade For Loans | Grade		7.07
Risk Grade Nine [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 41,562
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	43,457
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	43,429
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	6,436
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	5,063
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	17,960
Financing Receivable, Revolving	89,123
Loans and Leases Receivable, Net of Deferred Income	$ 252,038	$ 205,244
Weighted Average Risk Grade For Loans | Grade	9.00	9.00
Risk Grade Nine [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,353
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	3,814
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	897
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	437
Financing Receivable, Revolving	17,700
Loans and Leases Receivable, Net of Deferred Income	$ 25,255	$ 27,643
Weighted Average Risk Grade For Loans | Grade	9.00	9.00
Risk Grade Nine [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 613
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	7,036
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	108,049
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	68,104
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	9,145
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	37,054
Financing Receivable, Revolving	110,533
Loans and Leases Receivable, Net of Deferred Income	$ 341,075	$ 173,470
Weighted Average Risk Grade For Loans | Grade	9.00	9.00
Risk Grade Nine [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 1,499
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	6,358
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	30,611
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	76,103
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	5,396
Loans and Leases Receivable, Net of Deferred Income	$ 119,967	$ 127,102
Weighted Average Risk Grade For Loans | Grade	9.00	9.00
Risk Grade Nine [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income		$ 300,572
Weighted Average Risk Grade For Loans | Grade		9.00
Risk Grade Ten [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 25,688
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	5,250
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	5,278
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	15,136
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,927
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,848
Financing Receivable, Revolving	100,864
Loans and Leases Receivable, Net of Deferred Income	$ 160,698	$ 109,254
Weighted Average Risk Grade For Loans | Grade	10.00	10.00
Risk Grade Ten [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [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	27
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	734
Financing Receivable, Revolving	1,129
Loans and Leases Receivable, Net of Deferred Income	$ 1,890	$ 818
Weighted Average Risk Grade For Loans | Grade	10.00	10.00
Risk Grade Ten [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	6,048
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	35,944
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	15,690
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	48,851
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	15,918
Financing Receivable, Revolving	3,709
Loans and Leases Receivable, Net of Deferred Income	$ 126,160	$ 96,601
Weighted Average Risk Grade For Loans | Grade	10.00	10.00
Risk Grade Ten [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 13,555
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	12,299
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	15,000
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
Loans and Leases Receivable, Net of Deferred Income	$ 40,854	$ 17,035
Weighted Average Risk Grade For Loans | Grade	10.00	10.00
Risk Grade Ten [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income		$ 113,636
Weighted Average Risk Grade For Loans | Grade		10.00
Risk Grade Eleven [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 23,260
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	23,096
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	20,467
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	24,455
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,621
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,941
Financing Receivable, Revolving	91,166
Loans and Leases Receivable, Net of Deferred Income	$ 200,365	$ 125,261
Weighted Average Risk Grade For Loans | Grade	11.00	11.00
Risk Grade Eleven [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [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	2,094
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	18
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	89
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,963
Financing Receivable, Revolving	18,311
Loans and Leases Receivable, Net of Deferred Income	$ 23,910	$ 25,555
Weighted Average Risk Grade For Loans | Grade	11.00	11.00
Risk Grade Eleven [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 58
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	12,277
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	28,800
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	20,214
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	14,200
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	49,260
Financing Receivable, Revolving	856
Loans and Leases Receivable, Net of Deferred Income	$ 125,665	$ 114,071
Weighted Average Risk Grade For Loans | Grade	11.00	11.00
Risk Grade Eleven [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [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	35,367
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	11,130
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
Loans and Leases Receivable, Net of Deferred Income	$ 46,497	$ 10,501
Weighted Average Risk Grade For Loans | Grade	11.00	11.00
Risk Grade Eleven [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income		$ 124,572
Weighted Average Risk Grade For Loans | Grade		11.00
Risk Grade Twelve [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 11
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,257
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	250
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	2,937
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	924
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,719
Financing Receivable, Revolving	450
Loans and Leases Receivable, Net of Deferred Income	$ 20,327	$ 17,102
Weighted Average Risk Grade For Loans | Grade	12.00	12.00
Risk Grade Twelve [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 5,268
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	802
Loans and Leases Receivable, Net of Deferred Income	$ 7,593	$ 8,800
Weighted Average Risk Grade For Loans | Grade	12.00	12.00
Risk Grade Twelve [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	15,663
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	3,237
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,656
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,184
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 25,740	$ 19,770
Weighted Average Risk Grade For Loans | Grade	12.00	12.00
Risk Grade Twelve [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [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
Loans and Leases Receivable, Net of Deferred Income	$ 0	$ 0
Weighted Average Risk Grade For Loans | Grade	12.00	12.00
Risk Grade Twelve [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income		$ 19,770
Weighted Average Risk Grade For Loans | Grade		12.00
Risk Grade Thirteen [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	802
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	144
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	11
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	1,728
Loans and Leases Receivable, Net of Deferred Income	$ 5,119	$ 2,443
Weighted Average Risk Grade For Loans | Grade	13.00	13.00
Risk Grade Thirteen [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [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	2,700
Loans and Leases Receivable, Net of Deferred Income	$ 2,700	$ 2,700
Weighted Average Risk Grade For Loans | Grade	13.00	13.00
Risk Grade Thirteen [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	4,149
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	123
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
Loans and Leases Receivable, Net of Deferred Income	$ 4,272	$ 2,650
Weighted Average Risk Grade For Loans | Grade	13.00	13.00
Risk Grade Thirteen [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [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
Loans and Leases Receivable, Net of Deferred Income	$ 0	$ 0
Weighted Average Risk Grade For Loans | Grade	13.00	13.00
Risk Grade Thirteen [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income		$ 2,650
Weighted Average Risk Grade For Loans | Grade		13.00
Revolving Credit Facility [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.54
Revolving Credit Facility [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	5.76
Revolving Credit Facility [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	8.24
Revolving Credit Facility [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.27
Revolving Credit Facility [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.84
Revolving Loans Converted to Term [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 78,368
Weighted Average Risk Grade For Loans | Grade	8.53
Revolving Loans Converted to Term [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 8,532
Weighted Average Risk Grade For Loans | Grade	7.27
Revolving Loans Converted to Term [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 97,552
Weighted Average Risk Grade For Loans | Grade	6.71
Revolving Loans Converted to Term [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 0
Weighted Average Risk Grade For Loans | Grade	0
Revolving Loans Converted to Term [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 97,552
Weighted Average Risk Grade For Loans | Grade	6.71
Revolving Loans Converted to Term [Member] | Risk Grade One To Eight [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 50,085
Revolving Loans Converted to Term [Member] | Risk Grade One To Eight [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	7,897
Revolving Loans Converted to Term [Member] | Risk Grade One To Eight [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	97,011
Revolving Loans Converted to Term [Member] | Risk Grade One To Eight [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Nine [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	5,008
Revolving Loans Converted to Term [Member] | Risk Grade Nine [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	54
Revolving Loans Converted to Term [Member] | Risk Grade Nine [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	541
Revolving Loans Converted to Term [Member] | Risk Grade Nine [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Ten [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	707
Revolving Loans Converted to Term [Member] | Risk Grade Ten [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Ten [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Ten [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Eleven [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	8,359
Revolving Loans Converted to Term [Member] | Risk Grade Eleven [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	435
Revolving Loans Converted to Term [Member] | Risk Grade Eleven [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Eleven [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Twelve [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	11,779
Revolving Loans Converted to Term [Member] | Risk Grade Twelve [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	146
Revolving Loans Converted to Term [Member] | Risk Grade Twelve [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Twelve [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Thirteen [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	2,430
Revolving Loans Converted to Term [Member] | Risk Grade Thirteen [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Thirteen [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Thirteen [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 0
2024 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.52
2024 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	5.89
2024 [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.00
2024 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.46
2024 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.17
2023 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.91
2023 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.95
2023 [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.27
2023 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.39
2023 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.30
2022 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.13
2022 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.17
2022 [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.30
2022 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.70
2022 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.40
2021 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.30
2021 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	5.98
2021 [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.35
2021 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	8.28
2021 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.52
2020 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	5.82
2020 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.37
2020 [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.24
2020 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	2.54
2020 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.08
Prior Years [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.09
Prior Years [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	8.90
Prior Years [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.09
Prior Years [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.82
Prior Years [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.09