Loans Loans - Weighted Average Risk Grade for All Commercial Loans by Class and Year of Origination (Details) $ in Thousands	Jun. 30, 2023 USD ($) Grade	Dec. 31, 2022 USD ($) Grade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 17,746,311	$ 17,154,969
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,145,305
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	941,744
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	561,695
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	420,405
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	211,653
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	258,011
Financing Receivable, Revolving	2,122,788
Loans and Leases Receivable, Net of Deferred Income	$ 5,726,804	$ 5,674,798
Weighted Average Risk Grade For Loans | Grade	6.46	6.39
Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 311,743
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	70,287
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	83,419
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,469
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	7,643
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	6,089
Financing Receivable, Revolving	466,945
Loans and Leases Receivable, Net of Deferred Income	$ 986,571	$ 925,729
Weighted Average Risk Grade For Loans | Grade	5.96	5.67
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	$ 718,176
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,786,515
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,488,642
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	923,237
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	644,069
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,101,800
Financing Receivable, Revolving	155,033
Loans and Leases Receivable, Net of Deferred Income	$ 6,924,896	$ 6,706,078
Weighted Average Risk Grade For Loans | Grade	7.14	7.09
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 299,297
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	570,101
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	352,871
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	51,647
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	945
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,666
Financing Receivable, Revolving	191,544
Loans and Leases Receivable, Net of Deferred Income	$ 1,468,071	$ 1,477,247
Weighted Average Risk Grade For Loans | Grade	7.38	7.12
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 1,017,473
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,356,616
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,841,513
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	974,884
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	645,014
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,103,466
Financing Receivable, Revolving	346,577
Loans and Leases Receivable, Net of Deferred Income	$ 8,392,967	$ 8,183,325
Weighted Average Risk Grade For Loans | Grade	7.18	7.10
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	$ 1,113,216
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	919,731
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	524,735
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	406,763
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	186,103
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	243,703
Financing Receivable, Revolving	2,026,310
Loans and Leases Receivable, Net of Deferred Income	$ 5,468,565	$ 5,435,917
Weighted Average Risk Grade For Loans | Grade	6.29	6.24
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	$ 301,108
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	65,831
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	83,174
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,240
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,393
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	5,297
Financing Receivable, Revolving	457,225
Loans and Leases Receivable, Net of Deferred Income	$ 953,126	$ 887,182
Weighted Average Risk Grade For Loans | Grade	5.79	5.44
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	$ 699,039
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,735,438
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,421,130
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	851,503
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	570,561
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,009,089
Financing Receivable, Revolving	150,060
Loans and Leases Receivable, Net of Deferred Income	$ 6,540,008	$ 6,340,028
Weighted Average Risk Grade For Loans | Grade	6.97	6.94
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	$ 271,025
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	523,461
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	342,339
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	49,547
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	945
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,666
Financing Receivable, Revolving	179,127
Loans and Leases Receivable, Net of Deferred Income	$ 1,368,110	$ 1,430,012
Weighted Average Risk Grade For Loans | Grade	7.19	7.04
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		$ 7,770,040
Weighted Average Risk Grade For Loans | Grade		6.96
Risk Grade Nine [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 17,610
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	17,339
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	32,116
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,745
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,307
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	10,869
Financing Receivable, Revolving	40,715
Loans and Leases Receivable, Net of Deferred Income	$ 129,904	$ 146,192
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	$ 311
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	4,456
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	139
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	445
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	589
Financing Receivable, Revolving	3,603
Loans and Leases Receivable, Net of Deferred Income	$ 11,515	$ 11,112
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	$ 9,069
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	15,323
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	10,729
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	40,843
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	70,271
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	27,324
Financing Receivable, Revolving	1,980
Loans and Leases Receivable, Net of Deferred Income	$ 176,753	$ 189,928
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	$ 9,975
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	14,668
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	3,067
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	2,100
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	3,291
Loans and Leases Receivable, Net of Deferred Income	$ 33,101	$ 34,952
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		$ 224,880
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	$ 9,988
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	510
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	622
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	396
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	4,165
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	744
Financing Receivable, Revolving	19,268
Loans and Leases Receivable, Net of Deferred Income	$ 36,257	$ 37,596
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	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	355
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	189
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 544	$ 642
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	$ 491
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	29,583
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	7,991
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,086
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,754
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,796
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 50,347	$ 91,020
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	$ 18,297
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	7,347
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	9,126
Loans and Leases Receivable, Net of Deferred Income	$ 34,770	$ 931
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		$ 91,951
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	$ 4,491
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	4,164
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	4,001
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	8,747
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	16,121
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,523
Financing Receivable, Revolving	19,749
Loans and Leases Receivable, Net of Deferred Income	$ 69,861	$ 36,963
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	106
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	170
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,101
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	12
Financing Receivable, Revolving	1,285
Loans and Leases Receivable, Net of Deferred Income	$ 4,674	$ 11,569
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	$ 7,653
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	6,163
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	48,496
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	8,477
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	57,948
Financing Receivable, Revolving	2,993
Loans and Leases Receivable, Net of Deferred Income	$ 132,106	$ 81,550
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	31,972
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	118
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	$ 32,090	$ 11,352
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		$ 92,902
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	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	221
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	702
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,687
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,172
Financing Receivable, Revolving	14,607
Loans and Leases Receivable, Net of Deferred Income	$ 19,756	$ 12,521
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	$ 10,324
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	59
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,349
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2
Financing Receivable, Revolving	2,132
Loans and Leases Receivable, Net of Deferred Income	$ 14,012	$ 10,840
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	$ 1,924
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	8
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	296
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	17,178
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,483
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	3,493
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 24,382	$ 2,957
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		$ 2,957
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	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	52
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	270
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	2,139
Loans and Leases Receivable, Net of Deferred Income	$ 2,461	$ 5,609
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	$ 4,384
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	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,150
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	150
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 1,300	$ 595
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		$ 595
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	6.31
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	5.58
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	7.13
Revolving Credit Facility [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.65
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	7.41
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	$ 65,203
Weighted Average Risk Grade For Loans | Grade	7.66
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	$ 35,976
Weighted Average Risk Grade For Loans | Grade	5.69
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	$ 107,424
Weighted Average Risk Grade For Loans | Grade	6.50
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	$ 107,424
Weighted Average Risk Grade For Loans | Grade	6.50
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	$ 48,004
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	33,858
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	103,188
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	5,203
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	1,972
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	1,214
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	564
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	2,646
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	11,065
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	0
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	376
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	367
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	0
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
2023 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.31
2023 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.32
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	7.10
2023 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.68
2023 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.27
2022 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.76
2022 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.60
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	7.05
2022 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.39
2022 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.13
2021 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.10
2021 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	5.78
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	7.28
2021 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.39
2021 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.30
2020 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	5.93
2020 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.68
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	7.22
2020 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	4.63
2020 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.09
2019 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.57
2019 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	9.83
2019 [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	7.02
2019 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.07
2019 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.02
Prior Years [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.17
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	7.14
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	7.17
Prior Years [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.77
Prior Years [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.17