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Loans and Allowances for Credit Losses, Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	$ 1,856,432		$ 1,856,432		$ 4,453,665
Financing Receivable, Originated, Year Two	4,442,324		4,442,324		3,294,886
Financing Receivable, Originated, Year Three	3,136,948		3,136,948		2,107,063
Financing Receivable, Originated, Year Four	1,921,336		1,921,336		1,734,561
Financing Receivable, Originated, Year Five	1,488,572		1,488,572		1,157,972
Financing Receivable, Originated, More Than Five Years	3,608,359		3,608,359		2,992,242
Financing Receivable, Revolving	6,757,431		6,757,431		6,790,248
Financing Receivable, Revolving, Converted to Term Loan	26,257		26,257		26,513
Total	23,237,659		23,237,659		22,557,150
Financing Receivable, Allowance for Credit Loss, Writeoff	8,049	$ 1,368	11,716	$ 9,173
Commercial [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	1,301,234		1,301,234		2,655,782
Financing Receivable, Originated, Year Two	2,328,366		2,328,366		1,566,129
Financing Receivable, Originated, Year Three	1,423,875		1,423,875		994,261
Financing Receivable, Originated, Year Four	904,021		904,021		838,006
Financing Receivable, Originated, Year Five	739,101		739,101		779,311
Financing Receivable, Originated, More Than Five Years	2,138,793		2,138,793		1,657,429
Financing Receivable, Revolving	5,696,055		5,696,055		5,718,433
Financing Receivable, Revolving, Converted to Term Loan	3,071		3,071		3,148
Total	14,534,516		14,534,516		14,212,499
Financing Receivable, Allowance for Credit Loss, Writeoff	2,797	6	2,809	6,087
Commercial [Member] | Energy [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	120,233		120,233		157,745
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	99,929		99,929		76,951
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	50,910		50,910		30,284
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Four	8,713		8,713		13,447
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	11,179		11,179		6,377
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	12,051		12,051		5,822
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Revolving	3,205,737		3,205,737		3,134,164
Financing Receivable Revolving Writeoff			0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Financing Receivable Revolving Converted to Term Writeoff			0
Total	3,508,752		3,508,752		3,424,790
Financing Receivable, Allowance for Credit Loss, Writeoff			0
Commercial [Member] | Healthcare [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	357,976		357,976		932,097
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	858,531		858,531		604,886
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	602,789		602,789		476,854
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Four	472,475		472,475		450,755
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	407,292		407,292		471,362
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	1,014,360		1,014,360		659,507
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Revolving	277,947		277,947		249,536
Financing Receivable Revolving Writeoff			0
Financing Receivable, Revolving, Converted to Term Loan	17		17		20
Financing Receivable Revolving Converted to Term Writeoff			0
Total	3,991,387		3,991,387		3,845,017
Financing Receivable, Allowance for Credit Loss, Writeoff			0
Commercial [Member] | Services [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	378,254		378,254		822,287
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	700,727		700,727		507,219
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	467,122		467,122		287,523
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			882
Financing Receivable, Originated, Year Four	264,616		264,616		196,711
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	161,722		161,722		157,673
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	765,181		765,181		702,823
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Revolving	846,884		846,884		756,524
Financing Receivable Revolving Writeoff			1,899
Financing Receivable, Revolving, Converted to Term Loan	663		663		761
Financing Receivable Revolving Converted to Term Writeoff			0
Total	3,585,169		3,585,169		3,431,521
Financing Receivable, Allowance for Credit Loss, Writeoff			2,781
Commercial [Member] | General business [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	444,771		444,771		743,653
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	669,179		669,179		377,073
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	303,054		303,054		199,600
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Four	158,217		158,217		177,093
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			2
Financing Receivable, Originated, Year Five	158,908		158,908		143,899
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	347,201		347,201		289,277
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			12
Financing Receivable, Revolving	1,365,487		1,365,487		1,578,209
Financing Receivable Revolving Writeoff			4
Financing Receivable, Revolving, Converted to Term Loan	2,391		2,391		2,367
Financing Receivable Revolving Converted to Term Writeoff			10
Total	3,449,208		3,449,208		3,511,171
Financing Receivable, Allowance for Credit Loss, Writeoff			28
Commercial real estate [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	281,559		281,559		1,188,483
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	1,541,831		1,541,831		1,158,002
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	1,173,425		1,173,425		552,616
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Four	491,657		491,657		648,561
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	550,585		550,585		247,625
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	813,805		813,805		649,874
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			6,208
Financing Receivable, Revolving	117,939		117,939		161,616
Financing Receivable Revolving Writeoff			0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Financing Receivable Revolving Converted to Term Writeoff			0
Total	4,970,801		4,970,801		4,606,777
Financing Receivable, Allowance for Credit Loss, Writeoff	4,000	78	6,208	269
Loans to individuals [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	273,639		273,639		609,400
Financing Receivable, Originated, Year Two	572,127		572,127		570,755
Financing Receivable, Originated, Year Three	539,648		539,648		560,186
Financing Receivable, Originated, Year Four	525,658		525,658		247,994
Financing Receivable, Originated, Year Five	198,886		198,886		131,036
Financing Receivable, Originated, More Than Five Years	655,761		655,761		684,939
Financing Receivable, Revolving	943,437		943,437		910,199
Financing Receivable, Revolving, Converted to Term Loan	23,186		23,186		23,365
Total	3,732,342		3,732,342		3,737,874
Financing Receivable, Allowance for Credit Loss, Writeoff	1,252	$ 1,284	2,699	$ 2,817
Loans to individuals [Member] | Residential mortgage [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	190,406		190,406		354,529
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	340,442		340,442		374,927
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Three	361,610		361,610		395,948
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			7
Financing Receivable, Originated, Year Four	368,006		368,006		63,504
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Five	59,809		59,809		42,571
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	288,227		288,227		281,290
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			4
Financing Receivable, Revolving	362,253		362,253		354,986
Financing Receivable Revolving Writeoff			1
Financing Receivable, Revolving, Converted to Term Loan	22,937		22,937		23,029
Financing Receivable Revolving Converted to Term Writeoff			0
Total	1,993,690		1,993,690		1,890,784
Financing Receivable, Allowance for Credit Loss, Writeoff			12
Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		289
Financing Receivable, Originated, Year Two	1,184		1,184		2,254
Financing Receivable, Originated, Year Three	2,089		2,089		9,299
Financing Receivable, Originated, Year Four	6,171		6,171		12,182
Financing Receivable, Originated, Year Five	8,331		8,331		19,563
Financing Receivable, Originated, More Than Five Years	168,395		168,395		202,353
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	186,170		186,170		245,940
Loans to individuals [Member] | Personal [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	83,233		83,233		254,582
Financing Receivable Year One Originated Current Fiscal Year Writeoff			0
Financing Receivable, Originated, Year Two	230,501		230,501		193,574
Financing Receivable Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff			43
Financing Receivable, Originated, Year Three	175,949		175,949		154,939
Financing Receivable Year Three Originated Two Years Before Current Fiscal Year Writeoff			40
Financing Receivable, Originated, Year Four	151,481		151,481		172,308
Financing Receivable Year Four Originated Three Years Before Current Fiscal Year Writeoff			16
Financing Receivable, Originated, Year Five	130,746		130,746		68,902
Financing Receivable Year Five Originated Four Years Before Current Fiscal Year Writeoff			0
Financing Receivable, Originated, More Than Five Years	199,139		199,139		201,296
Financing Receivable Originated More than Five Years Before Current Fiscal Year Writeoff			2,584
Financing Receivable, Revolving	581,184		581,184		555,213
Financing Receivable Revolving Writeoff			4
Financing Receivable, Revolving, Converted to Term Loan	249		249		336
Financing Receivable Revolving Converted to Term Writeoff			1
Total	1,552,482		1,552,482		1,601,150
Financing Receivable, Allowance for Credit Loss, Writeoff			2,688
Performing [Member] | Commercial [Member] | Energy [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	120,233		120,233		157,745
Financing Receivable, Originated, Year Two	99,929		99,929		76,951
Financing Receivable, Originated, Year Three	50,910		50,910		30,284
Financing Receivable, Originated, Year Four	8,713		8,713		12,783
Financing Receivable, Originated, Year Five	10,528		10,528		5,992
Financing Receivable, Originated, More Than Five Years	10,884		10,884		4,980
Financing Receivable, Revolving	3,185,817		3,185,817		3,104,906
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	3,487,014		3,487,014		3,393,641
Performing [Member] | Commercial [Member] | Energy [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		664
Financing Receivable, Originated, Year Five	651		651		385
Financing Receivable, Originated, More Than Five Years	1,050		1,050		683
Financing Receivable, Revolving	0		0		28,018
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	1,701		1,701		29,750
Performing [Member] | Commercial [Member] | Healthcare [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	357,976		357,976		932,097
Financing Receivable, Originated, Year Two	857,991		857,991		604,886
Financing Receivable, Originated, Year Three	584,067		584,067		476,854
Financing Receivable, Originated, Year Four	465,489		465,489		404,204
Financing Receivable, Originated, Year Five	367,300		367,300		464,989
Financing Receivable, Originated, More Than Five Years	958,933		958,933		618,163
Financing Receivable, Revolving	275,267		275,267		245,898
Financing Receivable, Revolving, Converted to Term Loan	17		17		20
Total	3,867,040		3,867,040		3,747,111
Performing [Member] | Commercial [Member] | Healthcare [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	18,722		18,722		0
Financing Receivable, Originated, Year Four	6,986		6,986		20,071
Financing Receivable, Originated, Year Five	14,025		14,025		0
Financing Receivable, Originated, More Than Five Years	32,123		32,123		18,859
Financing Receivable, Revolving	980		980		4
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	72,836		72,836		38,934
Performing [Member] | Commercial [Member] | Healthcare [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	540		540		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		0
Financing Receivable, Originated, Year Five	0		0		0
Financing Receivable, Originated, More Than Five Years	12,518		12,518		14,304
Financing Receivable, Revolving	1,700		1,700		3,634
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	14,758		14,758		17,938
Performing [Member] | Commercial [Member] | Services [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	378,254		378,254		821,785
Financing Receivable, Originated, Year Two	681,854		681,854		496,510
Financing Receivable, Originated, Year Three	461,897		461,897		286,085
Financing Receivable, Originated, Year Four	262,276		262,276		193,481
Financing Receivable, Originated, Year Five	158,543		158,543		156,736
Financing Receivable, Originated, More Than Five Years	759,638		759,638		696,300
Financing Receivable, Revolving	820,662		820,662		722,371
Financing Receivable, Revolving, Converted to Term Loan	607		607		639
Total	3,523,731		3,523,731		3,373,907
Performing [Member] | Commercial [Member] | Services [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		502
Financing Receivable, Originated, Year Two	18,244		18,244		5,139
Financing Receivable, Originated, Year Three	252		252		989
Financing Receivable, Originated, Year Four	180		180		771
Financing Receivable, Originated, Year Five	623		623		894
Financing Receivable, Originated, More Than Five Years	2,171		2,171		1,345
Financing Receivable, Revolving	3,963		3,963		8,668
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	25,433		25,433		18,308
Performing [Member] | Commercial [Member] | Services [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	629		629		0
Financing Receivable, Originated, Year Three	836		836		0
Financing Receivable, Originated, Year Four	1,756		1,756		2,459
Financing Receivable, Originated, Year Five	2,556		2,556		43
Financing Receivable, Originated, More Than Five Years	3,372		3,372		2,789
Financing Receivable, Revolving	22,259		22,259		17,665
Financing Receivable, Revolving, Converted to Term Loan	56		56		122
Total	31,464		31,464		23,078
Performing [Member] | Commercial [Member] | General business [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	443,873		443,873		725,894
Financing Receivable, Originated, Year Two	624,377		624,377		361,839
Financing Receivable, Originated, Year Three	292,674		292,674		198,274
Financing Receivable, Originated, Year Four	158,127		158,127		172,878
Financing Receivable, Originated, Year Five	158,780		158,780		139,140
Financing Receivable, Originated, More Than Five Years	339,584		339,584		283,694
Financing Receivable, Revolving	1,327,452		1,327,452		1,570,536
Financing Receivable, Revolving, Converted to Term Loan	2,352		2,352		2,329
Total	3,347,219		3,347,219		3,454,584
Performing [Member] | Commercial [Member] | General business [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	898		898		17,759
Financing Receivable, Originated, Year Two	3,461		3,461		13,065
Financing Receivable, Originated, Year Three	7,449		7,449		208
Financing Receivable, Originated, Year Four	44		44		71
Financing Receivable, Originated, Year Five	114		114		7
Financing Receivable, Originated, More Than Five Years	1,485		1,485		2,291
Financing Receivable, Revolving	15,563		15,563		7,094
Financing Receivable, Revolving, Converted to Term Loan	0		0		26
Total	29,014		29,014		40,521
Performing [Member] | Commercial [Member] | General business [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	41,341		41,341		2,169
Financing Receivable, Originated, Year Three	2,931		2,931		66
Financing Receivable, Originated, Year Four	46		46		4,130
Financing Receivable, Originated, Year Five	0		0		4,680
Financing Receivable, Originated, More Than Five Years	6,072		6,072		3,287
Financing Receivable, Revolving	10,629		10,629		94
Financing Receivable, Revolving, Converted to Term Loan	10		10		4
Total	61,029		61,029		14,430
Performing [Member] | Commercial real estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	281,559		281,559		1,188,483
Financing Receivable, Originated, Year Two	1,541,831		1,541,831		1,158,002
Financing Receivable, Originated, Year Three	1,173,425		1,173,425		552,616
Financing Receivable, Originated, Year Four	491,657		491,657		641,102
Financing Receivable, Originated, Year Five	543,242		543,242		247,625
Financing Receivable, Originated, More Than Five Years	790,115		790,115		633,304
Financing Receivable, Revolving	117,939		117,939		161,616
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	4,939,768		4,939,768		4,582,748
Performing [Member] | Commercial real estate [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0
Financing Receivable, Originated, Year Two	0		0
Financing Receivable, Originated, Year Three	0		0
Financing Receivable, Originated, Year Four	0		0
Financing Receivable, Originated, Year Five	0		0
Financing Receivable, Originated, More Than Five Years	13,638		13,638
Financing Receivable, Revolving	0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0
Total	13,638		13,638
Performing [Member] | Commercial real estate [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One					0
Financing Receivable, Originated, Year Two					0
Financing Receivable, Originated, Year Three					0
Financing Receivable, Originated, Year Four					7,459
Financing Receivable, Originated, Year Five					0
Financing Receivable, Originated, More Than Five Years					0
Financing Receivable, Revolving					0
Financing Receivable, Revolving, Converted to Term Loan					0
Total					7,459
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	190,406		190,406		354,497
Financing Receivable, Originated, Year Two	339,049		339,049		373,190
Financing Receivable, Originated, Year Three	359,330		359,330		393,002
Financing Receivable, Originated, Year Four	363,831		363,831		63,142
Financing Receivable, Originated, Year Five	59,080		59,080		40,525
Financing Receivable, Originated, More Than Five Years	267,776		267,776		260,625
Financing Receivable, Revolving	356,384		356,384		352,126
Financing Receivable, Revolving, Converted to Term Loan	22,218		22,218		22,176
Total	1,958,074		1,958,074		1,859,283
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	246		246		81
Financing Receivable, Originated, Year Three	0		0		42
Financing Receivable, Originated, Year Four	1,347		1,347		0
Financing Receivable, Originated, Year Five	0		0		142
Financing Receivable, Originated, More Than Five Years	355		355		388
Financing Receivable, Revolving	3,388		3,388		527
Financing Receivable, Revolving, Converted to Term Loan	0		0		87
Total	5,336		5,336		1,267
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		187
Financing Receivable, Originated, Year Four	0		0		0
Financing Receivable, Originated, Year Five	0		0		0
Financing Receivable, Originated, More Than Five Years	54		54		138
Financing Receivable, Revolving	253		253		117
Financing Receivable, Revolving, Converted to Term Loan	0		0		1
Total	307		307		443
Performing [Member] | Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		289
Financing Receivable, Originated, Year Two	1,184		1,184		2,254
Financing Receivable, Originated, Year Three	2,089		2,089		9,000
Financing Receivable, Originated, Year Four	5,872		5,872		10,722
Financing Receivable, Originated, Year Five	7,690		7,690		17,244
Financing Receivable, Originated, More Than Five Years	157,862		157,862		191,426
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	174,697		174,697		230,935
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	83,233		83,233		254,497
Financing Receivable, Originated, Year Two	230,418		230,418		193,095
Financing Receivable, Originated, Year Three	175,862		175,862		154,887
Financing Receivable, Originated, Year Four	151,387		151,387		172,114
Financing Receivable, Originated, Year Five	130,574		130,574		68,871
Financing Receivable, Originated, More Than Five Years	199,122		199,122		201,278
Financing Receivable, Revolving	575,095		575,095		549,187
Financing Receivable, Revolving, Converted to Term Loan	249		249		332
Total	1,545,940		1,545,940		1,594,261
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Special Mention [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		47
Financing Receivable, Originated, Year Two	47		47		28
Financing Receivable, Originated, Year Three	82		82		40
Financing Receivable, Originated, Year Four	49		49		12
Financing Receivable, Originated, Year Five	7		7		17
Financing Receivable, Originated, More Than Five Years	3		3		0
Financing Receivable, Revolving	6,056		6,056		6,003
Financing Receivable, Revolving, Converted to Term Loan	0		0		4
Total	6,244		6,244		6,151
Performing [Member] | Loans to individuals [Member] | Personal [Member] | Accruing Substandard [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		444
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		160
Financing Receivable, Originated, Year Five	160		160		0
Financing Receivable, Originated, More Than Five Years	0		0		0
Financing Receivable, Revolving	5		5		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	165		165		604
Nonperforming Financial Instruments [Member] | Commercial [Member] | Energy [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		0
Financing Receivable, Originated, Year Five	0		0		0
Financing Receivable, Originated, More Than Five Years	117		117		159
Financing Receivable, Revolving	19,920		19,920		1,240
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	20,037		20,037		1,399
Nonperforming Financial Instruments [Member] | Commercial [Member] | Healthcare [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		26,480
Financing Receivable, Originated, Year Five	25,967		25,967		6,373
Financing Receivable, Originated, More Than Five Years	10,786		10,786		8,181
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	36,753		36,753		41,034
Nonperforming Financial Instruments [Member] | Commercial [Member] | Services [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		5,570
Financing Receivable, Originated, Year Three	4,137		4,137		449
Financing Receivable, Originated, Year Four	404		404		0
Financing Receivable, Originated, Year Five	0		0		0
Financing Receivable, Originated, More Than Five Years	0		0		2,389
Financing Receivable, Revolving	0		0		7,820
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	4,541		4,541		16,228
Nonperforming Financial Instruments [Member] | Commercial [Member] | General business [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		1,052
Financing Receivable, Originated, Year Four	0		0		14
Financing Receivable, Originated, Year Five	14		14		72
Financing Receivable, Originated, More Than Five Years	60		60		5
Financing Receivable, Revolving	11,843		11,843		485
Financing Receivable, Revolving, Converted to Term Loan	29		29		8
Total	11,946		11,946		1,636
Nonperforming Financial Instruments [Member] | Commercial real estate [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		0
Financing Receivable, Originated, Year Four	0		0		0
Financing Receivable, Originated, Year Five	7,343		7,343		0
Financing Receivable, Originated, More Than Five Years	10,052		10,052		16,570
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	17,395		17,395		16,570
Nonperforming Financial Instruments [Member] | Loans to individuals [Member] | Residential mortgage [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		32
Financing Receivable, Originated, Year Two	1,147		1,147		1,656
Financing Receivable, Originated, Year Three	2,280		2,280		2,717
Financing Receivable, Originated, Year Four	2,828		2,828		362
Financing Receivable, Originated, Year Five	729		729		1,904
Financing Receivable, Originated, More Than Five Years	20,042		20,042		20,139
Financing Receivable, Revolving	2,228		2,228		2,216
Financing Receivable, Revolving, Converted to Term Loan	719		719		765
Total	29,973		29,973		29,791
Nonperforming Financial Instruments [Member] | Loans to individuals [Member] | Residential mortgage [Member] | US Government Agency Insured Loans [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		0
Financing Receivable, Originated, Year Two	0		0		0
Financing Receivable, Originated, Year Three	0		0		299
Financing Receivable, Originated, Year Four	299		299		1,460
Financing Receivable, Originated, Year Five	641		641		2,319
Financing Receivable, Originated, More Than Five Years	10,533		10,533		10,927
Financing Receivable, Revolving	0		0		0
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	11,473		11,473		15,005
Nonperforming Financial Instruments [Member] | Loans to individuals [Member] | Personal [Member] | Nonaccrual [Member]
Financing Receivable, Credit Quality Indicator Line Items [Abstract]
Financing Receivable, Originated, Year One	0		0		38
Financing Receivable, Originated, Year Two	36		36		7
Financing Receivable, Originated, Year Three	5		5		12
Financing Receivable, Originated, Year Four	45		45		22
Financing Receivable, Originated, Year Five	5		5		14
Financing Receivable, Originated, More Than Five Years	14		14		18
Financing Receivable, Revolving	28		28		23
Financing Receivable, Revolving, Converted to Term Loan	0		0		0
Total	$ 133		$ 133		$ 134

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