Loans, Allowance for Credit Losses and Credit Quality Finance Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands		Sep. 30, 2021		Dec. 31, 2020	Sep. 30, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		$ 1,787,591			$ 1,504,307
Financing Receivable, Originated Two Years before Latest Fiscal Year		1,003,302			1,047,533
Financing Receivable, Originated Three Years before Latest Fiscal Year		627,225			970,908
Financing Receivable, Originated Four Years before Latest Fiscal Year		670,687			758,331
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		1,518,865			1,445,238
Financing Receivable, Revolving		1,349,078			1,454,822
Financing Receivable, after Allowance for Credit Loss		1,845,455			2,199,885
Loans and Leases Receivable, Gross		8,808,013	[1]	$ 9,392,866	9,405,193
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		1,064,880			877,770
Financing Receivable, Originated Two Years before Latest Fiscal Year		662,020			561,699
Financing Receivable, Originated Three Years before Latest Fiscal Year		376,159			616,367
Financing Receivable, Originated Four Years before Latest Fiscal Year		473,418			428,865
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		883,097			806,109
Financing Receivable, Revolving		30,683			39,998
Financing Receivable, after Allowance for Credit Loss		731,002			778,315
Loans and Leases Receivable, Gross		4,221,259	[1]	4,173,927	4,125,464	[1]
Commercial Real Estate [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		29,091			15,957
Financing Receivable, Originated Two Years before Latest Fiscal Year		51,976			20,313
Financing Receivable, Originated Three Years before Latest Fiscal Year		14,628			7,941
Financing Receivable, Originated Four Years before Latest Fiscal Year		21,350			27,253
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		82,655			47,875
Financing Receivable, Revolving		13,615			0
Financing Receivable, after Allowance for Credit Loss		22,106			20,639
Loans and Leases Receivable, Gross	[1]	235,421			139,978
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		1,019,453			859,548
Financing Receivable, Originated Two Years before Latest Fiscal Year		606,645			512,371
Financing Receivable, Originated Three Years before Latest Fiscal Year		347,874			587,345
Financing Receivable, Originated Four Years before Latest Fiscal Year		442,306			399,442
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		794,263			751,629
Financing Receivable, Revolving		17,068			39,998
Financing Receivable, after Allowance for Credit Loss		699,565			753,415
Loans and Leases Receivable, Gross	[1]	3,927,174			3,920,089
Commercial Real Estate [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		16,336			2,265
Financing Receivable, Originated Two Years before Latest Fiscal Year		3,399			10,092
Financing Receivable, Originated Three Years before Latest Fiscal Year		13,657			21,081
Financing Receivable, Originated Four Years before Latest Fiscal Year		9,762			2,170
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		6,179			6,605
Financing Receivable, Revolving		0			0
Financing Receivable, after Allowance for Credit Loss		9,331			4,261
Loans and Leases Receivable, Gross	[1]	58,664			46,474
Commercial Real Estate [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0			0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			18,923
Financing Receivable, Originated Three Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0			0
Financing Receivable, Revolving		0			0
Financing Receivable, after Allowance for Credit Loss		0			0
Loans and Leases Receivable, Gross	[1]	0			18,923
Commercial Real Estate [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0			0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0			0
Financing Receivable, Revolving		0			0
Financing Receivable, after Allowance for Credit Loss		0			0
Loans and Leases Receivable, Gross	[1]	0			0
Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		195,073			156,992
Financing Receivable, Originated Two Years before Latest Fiscal Year		101,174			137,899
Financing Receivable, Originated Three Years before Latest Fiscal Year		77,087			44,899
Financing Receivable, Originated Four Years before Latest Fiscal Year		18,833			26,767
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		18,577			24,214
Financing Receivable, Revolving		621,432			650,681
Financing Receivable, after Allowance for Credit Loss		608,467			1,018,266
Loans and Leases Receivable, Gross		1,640,709	[1]	2,103,152	2,062,345	[1]
Commercial And Industrial [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		9,035			2,302
Financing Receivable, Originated Two Years before Latest Fiscal Year		3,286			7,833
Financing Receivable, Originated Three Years before Latest Fiscal Year		1,672			4,573
Financing Receivable, Originated Four Years before Latest Fiscal Year		980			1,219
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		1,632			318
Financing Receivable, Revolving		10,262			15,248
Financing Receivable, after Allowance for Credit Loss		1,338			2,560
Loans and Leases Receivable, Gross	[1]	28,205			34,103
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	[2]	185,706			153,137
Financing Receivable, Originated Two Years before Latest Fiscal Year	[2]	97,095			107,318
Financing Receivable, Originated Three Years before Latest Fiscal Year	[2]	74,381			34,826
Financing Receivable, Originated Four Years before Latest Fiscal Year	[2]	15,175			23,065
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	[2]	16,731			22,334
Financing Receivable, Revolving	[2]	605,718			601,937
Financing Receivable, after Allowance for Credit Loss	[2]	590,532			1,012,974
Loans and Leases Receivable, Gross	[1],[2]	1,585,404			1,958,168
Commercial And Industrial [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		332			1,553
Financing Receivable, Originated Two Years before Latest Fiscal Year		793			22,748
Financing Receivable, Originated Three Years before Latest Fiscal Year		1,034			5,500
Financing Receivable, Originated Four Years before Latest Fiscal Year		2,678			2,483
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		214			1,419
Financing Receivable, Revolving		5,452			33,496
Financing Receivable, after Allowance for Credit Loss		16,597			2,732
Loans and Leases Receivable, Gross	[1]	27,100			69,931
Commercial And Industrial [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0			0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0			143
Financing Receivable, Revolving		0			0
Financing Receivable, after Allowance for Credit Loss		0			0
Loans and Leases Receivable, Gross	[1]	0			143
Commercial And Industrial [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0			0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0			0
Financing Receivable, Revolving		0			0
Financing Receivable, after Allowance for Credit Loss		0			0
Loans and Leases Receivable, Gross	[1]	0			0
Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		234,124			205,772
Financing Receivable, Originated Two Years before Latest Fiscal Year		82,559			79,338
Financing Receivable, Originated Three Years before Latest Fiscal Year		22,851			66,406
Financing Receivable, Originated Four Years before Latest Fiscal Year		22,873			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		6,505			6,750
Financing Receivable, Revolving		16,424			31,700
Financing Receivable, after Allowance for Credit Loss		127,945			182,291
Loans and Leases Receivable, Gross		515,415	[1]	553,929	573,334	[1]
Construction Loans [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		12,991			9,352
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			5,037
Financing Receivable, Originated Three Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0			0
Financing Receivable, Revolving					328
Financing Receivable, after Allowance for Credit Loss		0			0
Loans and Leases Receivable, Gross	[1]	12,991			14,717
Construction Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		216,573			196,420
Financing Receivable, Originated Two Years before Latest Fiscal Year		82,559			73,298
Financing Receivable, Originated Three Years before Latest Fiscal Year		22,851			66,406
Financing Receivable, Originated Four Years before Latest Fiscal Year		22,873			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		6,505			6,750
Financing Receivable, Revolving		16,424			31,372
Financing Receivable, after Allowance for Credit Loss		127,945			182,291
Loans and Leases Receivable, Gross	[1]	497,864			557,614
Construction Loans [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		4,560			0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			1,003
Financing Receivable, Originated Three Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0			0
Financing Receivable, Revolving		0			0
Financing Receivable, after Allowance for Credit Loss		0			0
Loans and Leases Receivable, Gross	[1]	4,560			1,003
Construction Loans [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0			0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0			0
Financing Receivable, Revolving		0			0
Financing Receivable, after Allowance for Credit Loss		0			0
Loans and Leases Receivable, Gross	[1]	0			0
Construction Loans [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0			0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0			0
Financing Receivable, Revolving		0			0
Financing Receivable, after Allowance for Credit Loss		0			0
Loans and Leases Receivable, Gross	[1]	0			0
Small Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		39,441			29,184
Financing Receivable, Originated Two Years before Latest Fiscal Year		22,499			20,900
Financing Receivable, Originated Three Years before Latest Fiscal Year		14,467			14,807
Financing Receivable, Originated Four Years before Latest Fiscal Year		10,690			15,381
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		22,267			23,599
Financing Receivable, Revolving		33,886			36,120
Financing Receivable, after Allowance for Credit Loss		40,888			27,641
Loans and Leases Receivable, Gross		184,138	[1]	175,023	167,632	[1]
Small Business [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0			10
Financing Receivable, Originated Two Years before Latest Fiscal Year		383			16
Financing Receivable, Originated Three Years before Latest Fiscal Year		200			10
Financing Receivable, Originated Four Years before Latest Fiscal Year		5			755
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		174			232
Financing Receivable, Revolving		627			736
Financing Receivable, after Allowance for Credit Loss		14			0
Loans and Leases Receivable, Gross	[1]	1,403			1,759
Small Business [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		38,804			28,766
Financing Receivable, Originated Two Years before Latest Fiscal Year		22,075			20,806
Financing Receivable, Originated Three Years before Latest Fiscal Year		14,241			14,627
Financing Receivable, Originated Four Years before Latest Fiscal Year		10,675			14,528
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		21,809			22,644
Financing Receivable, Revolving		32,679			34,569
Financing Receivable, after Allowance for Credit Loss		40,736			27,457
Loans and Leases Receivable, Gross	[1]	181,019			163,397
Small Business [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		637			408
Financing Receivable, Originated Two Years before Latest Fiscal Year		41			78
Financing Receivable, Originated Three Years before Latest Fiscal Year		26			170
Financing Receivable, Originated Four Years before Latest Fiscal Year		10			98
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		284			723
Financing Receivable, Revolving		580			786
Financing Receivable, after Allowance for Credit Loss		138			184
Loans and Leases Receivable, Gross	[1]	1,716			2,447
Small Business [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0			0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0			0
Financing Receivable, Revolving		0			29
Financing Receivable, after Allowance for Credit Loss		0			0
Loans and Leases Receivable, Gross	[1]	0			29
Small Business [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0			0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0			0
Financing Receivable, Revolving		0			0
Financing Receivable, after Allowance for Credit Loss		0			0
Loans and Leases Receivable, Gross	[1]	0			0
Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		185,097			167,901
Financing Receivable, Originated Two Years before Latest Fiscal Year		92,723			187,954
Financing Receivable, Originated Three Years before Latest Fiscal Year		98,939			168,283
Financing Receivable, Originated Four Years before Latest Fiscal Year		102,581			241,805
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		465,560			453,943
Financing Receivable, Revolving		0			0
Financing Receivable, after Allowance for Credit Loss		277,949			132,419
Loans and Leases Receivable, Gross		1,222,849	[1]	$ 1,296,183	1,352,305	[1]
Residential Real Estate [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		123			0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			760
Financing Receivable, Originated Three Years before Latest Fiscal Year		1,024			235
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			167
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		2,163			4,724
Financing Receivable, Revolving		0			0
Financing Receivable, after Allowance for Credit Loss		0			728
Loans and Leases Receivable, Gross	[1]	3,310			6,614
Residential Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		184,974			167,901
Financing Receivable, Originated Two Years before Latest Fiscal Year		92,723			187,194
Financing Receivable, Originated Three Years before Latest Fiscal Year		97,915			168,048
Financing Receivable, Originated Four Years before Latest Fiscal Year		102,581			241,638
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		463,397			449,219
Financing Receivable, Revolving		0			0
Financing Receivable, after Allowance for Credit Loss		277,949			131,691
Loans and Leases Receivable, Gross	[1]	1,219,539			1,345,691
Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		68,629			66,238
Financing Receivable, Originated Two Years before Latest Fiscal Year		42,083			59,534
Financing Receivable, Originated Three Years before Latest Fiscal Year		37,644			59,387
Financing Receivable, Originated Four Years before Latest Fiscal Year		41,792			44,817
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		117,521			122,852
Financing Receivable, Revolving		630,292			683,828
Financing Receivable, after Allowance for Credit Loss		58,897			60,274
Loans and Leases Receivable, Gross	[1]	1,000,468			1,101,054
Home Equity Loan [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0			0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		33			455
Financing Receivable, Revolving		1,717			2,044
Financing Receivable, after Allowance for Credit Loss		0			0
Loans and Leases Receivable, Gross	[1]	1,785			2,566
Home Equity Loan [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		68,629			66,238
Financing Receivable, Originated Two Years before Latest Fiscal Year		42,083			59,534
Financing Receivable, Originated Three Years before Latest Fiscal Year		37,644			59,387
Financing Receivable, Originated Four Years before Latest Fiscal Year		41,792			44,817
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		117,488			122,397
Financing Receivable, Revolving		628,575			681,784
Financing Receivable, after Allowance for Credit Loss		58,897			60,274
Loans and Leases Receivable, Gross	[1]	998,683			1,098,488
Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		347			450
Financing Receivable, Originated Two Years before Latest Fiscal Year		244			209
Financing Receivable, Originated Three Years before Latest Fiscal Year		78			759
Financing Receivable, Originated Four Years before Latest Fiscal Year		500			696
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		5,338			7,771
Financing Receivable, Revolving		16,361			12,495
Financing Receivable, after Allowance for Credit Loss		307			679
Loans and Leases Receivable, Gross	[1]	23,175			23,059
Consumer Loan [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		0			0
Financing Receivable, Originated Two Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Three Years before Latest Fiscal Year		0			20
Financing Receivable, Originated Four Years before Latest Fiscal Year		0			0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		0			34
Financing Receivable, Revolving		2			2
Financing Receivable, after Allowance for Credit Loss		0			0
Loans and Leases Receivable, Gross	[1]	2			56
Consumer Loan [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year		347			450
Financing Receivable, Originated Two Years before Latest Fiscal Year		244			209
Financing Receivable, Originated Three Years before Latest Fiscal Year		78			739
Financing Receivable, Originated Four Years before Latest Fiscal Year		500			696
Financing Receivable, Originated Five or More Years before Latest Fiscal Year		5,338			7,737
Financing Receivable, Revolving		16,359			12,493
Financing Receivable, after Allowance for Credit Loss		307			679
Loans and Leases Receivable, Gross	[1]	23,173			23,003
Revolving converted to term [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		5,810			24,169
Revolving converted to term [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			16,341
Revolving converted to term [Member] | Commercial Real Estate [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			16,341
Revolving converted to term [Member] | Commercial Real Estate [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Commercial Real Estate [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Commercial Real Estate [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		66			2,627
Revolving converted to term [Member] | Commercial And Industrial [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			50
Revolving converted to term [Member] | Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	[2]	66			2,577
Revolving converted to term [Member] | Commercial And Industrial [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Commercial And Industrial [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Commercial And Industrial [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		2,134			1,077
Revolving converted to term [Member] | Construction Loans [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Construction Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		2,134			1,077
Revolving converted to term [Member] | Construction Loans [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Construction Loans [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Construction Loans [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Small Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Small Business [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Small Business [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Small Business [Member] | Definite Weakness Loss Unlikely [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Small Business [Member] | Partial Loss Probable [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Small Business [Member] | Definite Loss [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Residential Real Estate [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Residential Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		3,610			4,124
Revolving converted to term [Member] | Home Equity Loan [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		35			67
Revolving converted to term [Member] | Home Equity Loan [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		3,575			4,057
Revolving converted to term [Member] | Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Consumer Loan [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		0			0
Revolving converted to term [Member] | Consumer Loan [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving		$ 0			$ 0

[1] Loan origination dates in the tables above reflect the original origination date, or the date of a material modification of a previously originated loan.

[2] Loans originated as part of the Paycheck Protection Program ("PPP") established by the CARES Act are included within commercial and industrial under the 2021 and 2020 vintage year and "pass" category as these loans are 100% guaranteed by the U.S. Government. Outstanding PPP loans totaled $383.6 million as of September 30, 2021, including $16.3 million and $367.3 million originated in 2020 and 2021, respectively, while outstanding PPP loans as of September 30, 2020 totaled $811.7 million