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Allowance for Loan and Lease Losses - Loans Modified in Troubled Debt Restructuring (Details) - Originated Loans and Leases $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) loan	Jun. 30, 2018 USD ($) loan	Jun. 30, 2019 USD ($) loan	Jun. 30, 2018 USD ($) loan
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1	1	2	2
Pre-Modification Outstanding Recorded Investment	$ 595	$ 49	$ 763	$ 112
Post-Modification Outstanding Recorded Investment	$ 595	$ 49	$ 763	$ 112
Number of Loans | loan	0	0	0	0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Commercial real estate | Commercial real estate
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan	1		1
Pre-Modification Outstanding Recorded Investment	$ 595		$ 595
Post-Modification Outstanding Recorded Investment	$ 595		$ 595
Number of Loans | loan	0		0
Post-Modification Outstanding Recorded Investment	$ 0		$ 0
Residential real estate | Home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Number of Loans | loan		1	1	2
Pre-Modification Outstanding Recorded Investment		$ 49	$ 168	$ 112
Post-Modification Outstanding Recorded Investment		$ 49	$ 168	$ 112
Number of Loans | loan		0	0	0
Post-Modification Outstanding Recorded Investment		$ 0	$ 0	$ 0

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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Amount, after troubled debt restructuring, of modified financing receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953676-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953682-111524

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Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 34
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