Loans, Allowance for Credit Losses and Credit Quality Finance Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	$ 2,425,930		$ 1,711,032
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,232,875		1,267,076
Financing Receivable, Originated Three Years before Latest Fiscal Year	787,014		1,131,429
Financing Receivable, Originated Four Years before Latest Fiscal Year	801,171		879,559
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,840,588		1,749,590
Financing Receivable, Revolving	1,353,864		1,674,656
Financing Receivable, after Allowance for Credit Loss	803,487		497,485
Loans and Leases Receivable, Gross	9,246,691	$ 9,392,866	8,916,430
Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,095,178		955,120
Financing Receivable, Originated Two Years before Latest Fiscal Year	745,562		627,312
Financing Receivable, Originated Three Years before Latest Fiscal Year	467,476		680,236
Financing Receivable, Originated Four Years before Latest Fiscal Year	553,067		485,668
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	1,067,973		999,942
Financing Receivable, Revolving	29,808		48,056
Financing Receivable, after Allowance for Credit Loss	218,553		262,026
Loans and Leases Receivable, Gross	4,177,617	4,173,927	4,061,347
Commercial Real Estate [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	29,218		8,303
Financing Receivable, Originated Two Years before Latest Fiscal Year	53,849		33,755
Financing Receivable, Originated Three Years before Latest Fiscal Year	31,274		8,506
Financing Receivable, Originated Four Years before Latest Fiscal Year	18,981		9,851
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	86,160		42,382
Financing Receivable, Revolving	13,612		0
Financing Receivable, after Allowance for Credit Loss	390		1,809
Loans and Leases Receivable, Gross	233,484		104,606
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	1,043,424		943,205
Financing Receivable, Originated Two Years before Latest Fiscal Year	687,959		586,125
Financing Receivable, Originated Three Years before Latest Fiscal Year	432,728		651,335
Financing Receivable, Originated Four Years before Latest Fiscal Year	524,194		468,824
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	966,331		945,248
Financing Receivable, Revolving	16,196		48,056
Financing Receivable, after Allowance for Credit Loss	214,573		260,217
Loans and Leases Receivable, Gross	3,885,405		3,905,997
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	22,536		3,612
Financing Receivable, Originated Two Years before Latest Fiscal Year	3,754		7,432
Financing Receivable, Originated Three Years before Latest Fiscal Year	3,474		20,395
Financing Receivable, Originated Four Years before Latest Fiscal Year	9,892		6,993
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	15,482		12,312
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	3,590		0
Loans and Leases Receivable, Gross	58,728		50,744
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		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	0		0
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	0		0
Commercial And Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	740,231		221,485
Financing Receivable, Originated Two Years before Latest Fiscal Year	131,206		165,871
Financing Receivable, Originated Three Years before Latest Fiscal Year	92,445		60,821
Financing Receivable, Originated Four Years before Latest Fiscal Year	32,793		40,014
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	30,953		35,897
Financing Receivable, Revolving	617,025		803,016
Financing Receivable, after Allowance for Credit Loss	442,018		120,743
Loans and Leases Receivable, Gross	2,086,671	2,103,152	1,448,224
Commercial And Industrial [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	14,991		5,432
Financing Receivable, Originated Two Years before Latest Fiscal Year	2,636		1,489
Financing Receivable, Originated Three Years before Latest Fiscal Year	2,148		4,909
Financing Receivable, Originated Four Years before Latest Fiscal Year	4,288		725
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	3,205		697
Financing Receivable, Revolving	12,252		21,780
Financing Receivable, after Allowance for Credit Loss	3,424		362
Loans and Leases Receivable, Gross	42,944		35,444
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	724,577		213,925
Financing Receivable, Originated Two Years before Latest Fiscal Year	127,454		138,376
Financing Receivable, Originated Three Years before Latest Fiscal Year	88,970		50,323
Financing Receivable, Originated Four Years before Latest Fiscal Year	25,737		36,685
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	27,123		33,576
Financing Receivable, Revolving	589,448		736,304
Financing Receivable, after Allowance for Credit Loss	420,682		119,886
Loans and Leases Receivable, Gross	2,003,991		1,329,402
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	663		2,128
Financing Receivable, Originated Two Years before Latest Fiscal Year	1,116		26,006
Financing Receivable, Originated Three Years before Latest Fiscal Year	1,327		5,589
Financing Receivable, Originated Four Years before Latest Fiscal Year	2,768		2,604
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	482		1,575
Financing Receivable, Revolving	6,927		44,932
Financing Receivable, after Allowance for Credit Loss	17,912		495
Loans and Leases Receivable, Gross	31,195		83,329
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	143		49
Financing Receivable, Revolving	8,398		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	8,541		49
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
Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	257,498		222,327
Financing Receivable, Originated Two Years before Latest Fiscal Year	151,767		116,795
Financing Receivable, Originated Three Years before Latest Fiscal Year	28,709		92,537
Financing Receivable, Originated Four Years before Latest Fiscal Year	23,313		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,628		6,867
Financing Receivable, Revolving	20,124		44,918
Financing Receivable, after Allowance for Credit Loss	28,323		43,369
Loans and Leases Receivable, Gross	516,362	553,929	527,138
Construction Loans [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	17,544		554
Financing Receivable, Originated Two Years before Latest Fiscal Year	9,691		347
Financing Receivable, Originated Three Years before Latest Fiscal Year			19,044
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	190		347
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	27,425		20,292
Construction Loans [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	239,954		221,773
Financing Receivable, Originated Two Years before Latest Fiscal Year	142,076		114,561
Financing Receivable, Originated Three Years before Latest Fiscal Year	28,189		73,493
Financing Receivable, Originated Four Years before Latest Fiscal Year	23,313		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,628		6,867
Financing Receivable, Revolving	19,934		44,225
Financing Receivable, after Allowance for Credit Loss	28,323		43,369
Loans and Leases Receivable, Gross	488,417		504,613
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	0		0
Financing Receivable, Originated Two Years before Latest Fiscal Year			1,887
Financing Receivable, Originated Three Years before Latest Fiscal Year	520		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			346
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	520		2,233
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	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	0		0
Small Business [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	42,095		31,710
Financing Receivable, Originated Two Years before Latest Fiscal Year	26,257		25,335
Financing Receivable, Originated Three Years before Latest Fiscal Year	18,013		17,912
Financing Receivable, Originated Four Years before Latest Fiscal Year	12,651		18,516
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	29,812		27,591
Financing Receivable, Revolving	35,076		48,342
Financing Receivable, after Allowance for Credit Loss	10,307		8,414
Loans and Leases Receivable, Gross	174,211	175,023	177,820
Small Business [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year			12
Financing Receivable, Originated Two Years before Latest Fiscal Year	389		18
Financing Receivable, Originated Three Years before Latest Fiscal Year	204		13
Financing Receivable, Originated Four Years before Latest Fiscal Year	10		753
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	202		259
Financing Receivable, Revolving	634		597
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	1,439		1,652
Small Business [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	41,418		31,651
Financing Receivable, Originated Two Years before Latest Fiscal Year	25,817		25,184
Financing Receivable, Originated Three Years before Latest Fiscal Year	17,750		17,848
Financing Receivable, Originated Four Years before Latest Fiscal Year	12,624		17,594
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	29,309		26,734
Financing Receivable, Revolving	33,658		47,109
Financing Receivable, after Allowance for Credit Loss	10,307		8,414
Loans and Leases Receivable, Gross	170,883		174,534
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	677		47
Financing Receivable, Originated Two Years before Latest Fiscal Year	51		133
Financing Receivable, Originated Three Years before Latest Fiscal Year	59		51
Financing Receivable, Originated Four Years before Latest Fiscal Year	17		169
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	301		598
Financing Receivable, Revolving	758		636
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	1,863		1,634
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	26		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	26		0
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	0		0
Residential Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	212,891		204,524
Financing Receivable, Originated Two Years before Latest Fiscal Year	126,359		261,326
Financing Receivable, Originated Three Years before Latest Fiscal Year	133,577		211,097
Financing Receivable, Originated Four Years before Latest Fiscal Year	130,580		283,255
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	557,725		529,092
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	80,657		39,122
Loans and Leases Receivable, Gross	1,241,789	$ 1,296,183	1,528,416
Residential Real Estate [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			427
Financing Receivable, Originated Three Years before Latest Fiscal Year	427		435
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	2,877		5,350
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	3,304		6,212
Residential Real Estate [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	212,891		204,524
Financing Receivable, Originated Two Years before Latest Fiscal Year	126,359		260,899
Financing Receivable, Originated Three Years before Latest Fiscal Year	133,150		210,662
Financing Receivable, Originated Four Years before Latest Fiscal Year	130,580		283,255
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	554,848		523,742
Financing Receivable, Revolving	0		0
Financing Receivable, after Allowance for Credit Loss	80,657		39,122
Loans and Leases Receivable, Gross	1,238,485		1,522,204
Home Equity Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	77,497		75,161
Financing Receivable, Originated Two Years before Latest Fiscal Year	51,398		70,081
Financing Receivable, Originated Three Years before Latest Fiscal Year	46,648		67,758
Financing Receivable, Originated Four Years before Latest Fiscal Year	48,132		51,106
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	140,586		139,312
Financing Receivable, Revolving	638,889		717,541
Financing Receivable, after Allowance for Credit Loss	23,583		23,397
Loans and Leases Receivable, Gross	1,028,495		1,146,270
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			18
Financing Receivable, Originated Four Years before Latest Fiscal Year	0		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	210		579
Financing Receivable, Revolving	2,008		2,372
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	2,218		3,030
Home Equity Loan [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	77,497		75,161
Financing Receivable, Originated Two Years before Latest Fiscal Year	51,398		70,081
Financing Receivable, Originated Three Years before Latest Fiscal Year	46,648		67,740
Financing Receivable, Originated Four Years before Latest Fiscal Year	48,132		51,106
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	140,376		138,733
Financing Receivable, Revolving	636,881		715,169
Financing Receivable, after Allowance for Credit Loss	23,583		23,397
Loans and Leases Receivable, Gross	1,026,277		1,143,240
Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	540		705
Financing Receivable, Originated Two Years before Latest Fiscal Year	326		356
Financing Receivable, Originated Three Years before Latest Fiscal Year	146		1,068
Financing Receivable, Originated Four Years before Latest Fiscal Year	635		1,000
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,911		10,889
Financing Receivable, Revolving	12,942		12,783
Financing Receivable, after Allowance for Credit Loss	46		414
Loans and Leases Receivable, Gross	21,546		27,215
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		19
Financing Receivable, Originated Four Years before Latest Fiscal Year	15		0
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	111		39
Financing Receivable, Revolving	3		16
Financing Receivable, after Allowance for Credit Loss	0		0
Loans and Leases Receivable, Gross	129		74
Consumer Loan [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Originated in Fiscal Year before Latest Fiscal Year	540		705
Financing Receivable, Originated Two Years before Latest Fiscal Year	326		356
Financing Receivable, Originated Three Years before Latest Fiscal Year	146		1,049
Financing Receivable, Originated Four Years before Latest Fiscal Year	620		1,000
Financing Receivable, Originated Five or More Years before Latest Fiscal Year	6,800		10,850
Financing Receivable, Revolving	12,939		12,767
Financing Receivable, after Allowance for Credit Loss	46		414
Loans and Leases Receivable, Gross	21,417		27,141
Revolving converted to term [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	1,762		5,603
Revolving converted to term [Member] | Commercial Real Estate [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	0		2,987
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			2,987
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			377
Revolving converted to term [Member] | Commercial And Industrial [Member] | Potential Weakness [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving			50
Revolving converted to term [Member] | Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving			327
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			325
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			325
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	1,762		1,914
Revolving converted to term [Member] | Home Equity Loan [Member] | Default [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving			61
Revolving converted to term [Member] | Home Equity Loan [Member] | Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Financing Receivable, Revolving	1,762		1,853
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