Loans Loans - Weighted Average Risk Grade for All Commercial Loans by Class and Year of Origination (Details) $ in Thousands	Jun. 30, 2022 USD ($) Grade	Dec. 31, 2021 USD ($) Grade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 16,736,026	$ 16,336,397
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,027,153
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	852,191
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	582,273
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	289,898
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	167,930
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	232,809
Financing Receivable, Revolving	2,318,394
Loans and Leases Receivable, Net of Deferred Income	$ 5,539,277	$ 5,364,954
Weighted Average Risk Grade For Loans | Grade	6.38	6.22
Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 328,807
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	111,479
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	7,821
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	12,669
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	4,735
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	5,403
Financing Receivable, Revolving	467,542
Loans and Leases Receivable, Net of Deferred Income	$ 987,925	$ 1,077,792
Weighted Average Risk Grade For Loans | Grade	5.82	6.06
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	$ 1,173,006
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,548,499
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,118,143
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	895,947
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	478,947
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,100,358
Financing Receivable, Revolving	96,082
Loans and Leases Receivable, Net of Deferred Income	$ 6,520,280	$ 6,272,339
Weighted Average Risk Grade For Loans | Grade	7.12	7.22
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 315,359
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	663,001
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	182,566
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	114,018
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	631
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,205
Financing Receivable, Revolving	253,781
Loans and Leases Receivable, Net of Deferred Income	$ 1,535,808	$ 1,304,271
Weighted Average Risk Grade For Loans | Grade	6.96	7.06
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 1,488,365
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,211,500
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,300,709
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,009,965
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	479,578
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,102,563
Financing Receivable, Revolving	349,863
Loans and Leases Receivable, Net of Deferred Income	$ 8,056,088	$ 7,576,610
Weighted Average Risk Grade For Loans | Grade	7.09	7.19
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	$ 1,009,520
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	805,675
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	563,122
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	267,129
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	142,114
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	221,192
Financing Receivable, Revolving	2,213,761
Loans and Leases Receivable, Net of Deferred Income	$ 5,276,748	$ 5,063,847
Weighted Average Risk Grade For Loans | Grade	6.23	6.01
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	$ 312,271
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	111,163
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	6,939
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	6,332
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	3,564
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	5,239
Financing Receivable, Revolving	446,460
Loans and Leases Receivable, Net of Deferred Income	$ 941,153	$ 1,008,370
Weighted Average Risk Grade For Loans | Grade	5.57	5.78
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	$ 1,101,851
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,495,414
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	999,836
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	788,421
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	428,539
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	963,918
Financing Receivable, Revolving	84,964
Loans and Leases Receivable, Net of Deferred Income	$ 5,969,393	$ 5,574,922
Weighted Average Risk Grade For Loans | Grade	6.90	6.91
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	$ 276,072
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	662,364
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	179,896
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	100,915
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	631
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,804
Financing Receivable, Revolving	253,781
Loans and Leases Receivable, Net of Deferred Income	$ 1,479,710	$ 1,262,200
Weighted Average Risk Grade For Loans | Grade	6.86	6.99
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		$ 6,837,122
Weighted Average Risk Grade For Loans | Grade		6.92
Risk Grade Nine [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 12,633
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	21,474
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	6,914
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	9,067
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	20,961
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	8,682
Financing Receivable, Revolving	79,546
Loans and Leases Receivable, Net of Deferred Income	$ 164,939	$ 187,870
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	$ 1,660
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	95
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	268
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,192
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	26
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	10,955
Loans and Leases Receivable, Net of Deferred Income	$ 14,235	$ 36,622
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	$ 64,026
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	27,271
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	99,934
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	47,898
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	20,773
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	35,908
Financing Receivable, Revolving	7,412
Loans and Leases Receivable, Net of Deferred Income	$ 306,070	$ 321,533
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	$ 11,295
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	637
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,670
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	401
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 15,003	$ 41,123
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		$ 362,656
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	$ 5,000
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	23,293
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,437
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	705
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,808
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	255
Financing Receivable, Revolving	20,879
Loans and Leases Receivable, Net of Deferred Income	$ 56,470	$ 59,137
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	73
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	515
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	239
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 885	$ 1,773
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	$ 5,851
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	17,824
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	17,104
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	52,210
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	20,353
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	53,622
Financing Receivable, Revolving	3,500
Loans and Leases Receivable, Net of Deferred Income	$ 170,464	$ 269,447
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	$ 27,992
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	13,103
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	0
Loans and Leases Receivable, Net of Deferred Income	$ 41,095	$ 0
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		$ 269,447
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	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,651
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	6,280
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	9,490
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,556
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,027
Financing Receivable, Revolving	4,100
Loans and Leases Receivable, Net of Deferred Income	$ 29,950	$ 31,518
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	$ 9,097
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	221
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	541
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,630
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	885
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	164
Financing Receivable, Revolving	5,000
Loans and Leases Receivable, Net of Deferred Income	$ 20,538	$ 16,594
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	$ 162
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	434
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,269
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	7,189
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	8,969
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	44,318
Financing Receivable, Revolving	206
Loans and Leases Receivable, Net of Deferred Income	$ 62,547	$ 91,140
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	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	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		$ 91,140
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	98
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,569
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,106
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,427
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	251
Financing Receivable, Revolving	108
Loans and Leases Receivable, Net of Deferred Income	$ 8,306	$ 12,535
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	$ 3,463
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	21
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	2,771
Loans and Leases Receivable, Net of Deferred Income	$ 6,442	$ 8,953
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	$ 646
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	6,545
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	229
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	313
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	2,592
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 10,325	$ 15,097
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	$ 748
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		$ 15,845
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	951
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	401
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	64
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	402
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 2,864	$ 10,047
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	$ 2,316
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	2,356
Loans and Leases Receivable, Net of Deferred Income	$ 4,672	$ 5,480
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	$ 470
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,011
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	$ 1,481	$ 200
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	$ 200
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		$ 400
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	6.20
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	5.46
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	7.24
Revolving Credit Facility [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.10
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	6.41
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	$ 68,629
Weighted Average Risk Grade For Loans | Grade	7.52
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	$ 49,469
Weighted Average Risk Grade For Loans | Grade	6.25
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	$ 109,298
Weighted Average Risk Grade For Loans | Grade	6.44
Revolving Loans Converted to Term [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 4,247
Weighted Average Risk Grade For Loans | Grade	5.01
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	$ 113,545
Weighted Average Risk Grade For Loans | Grade	6.39
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	$ 54,235
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	49,185
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	106,450
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	4,247
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	5,662
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	39
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	2,848
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	2,093
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	58
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	4,846
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	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	747
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	187
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	1,046
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
2022 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.28
2022 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.09
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	7.01
2022 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.10
2022 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.03
2021 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.03
2021 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	5.66
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	7.23
2021 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.12
2021 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.19
2020 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.10
2020 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.69
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	7.16
2020 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.64
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	6.75
2019 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	8.63
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	7.25
2019 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	8.21
2019 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.36
2018 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.01
2018 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	8.30
2018 [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
2018 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.21
2018 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.28
Prior Years [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	5.79
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	7.17
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	6.95
Prior Years [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.16
Prior Years [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.95