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Loans - TDRs by Class and Specific Reserve (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	76	62
Balance	$ 25,222	$ 17,801
Specific Reserves	$ 1,568	$ 323
Commercial | Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	17	8
Balance	$ 8,631	$ 7,038
Specific Reserves	$ 132	$ 90
Commercial | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	1	1
Balance	$ 721	$ 741
Specific Reserves	$ 0	$ 0
Commercial | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	10	4
Balance	$ 7,298	$ 561
Specific Reserves	$ 1,276	$ 0
Municipal
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0
Balance	$ 0	$ 0
Specific Reserves	$ 0	$ 0
Residential | Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0
Balance	$ 0	$ 0
Specific Reserves	$ 0	$ 0
Residential | Term
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	45	46
Balance	$ 8,074	$ 8,948
Specific Reserves	$ 160	$ 233
Home Equity LIne of Credit
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	3	3
Balance	$ 498	$ 513
Specific Reserves	$ 0	$ 0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans | loan	0	0
Balance	$ 0	$ 0
Specific Reserves	$ 0	$ 0

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- Definition

Specific allowance for loan and lease losses on receivable financings that are classified as troubled debt restructurings.

+ References

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+ References

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- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

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- Definition

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=82895541&loc=d3e18845-111554

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