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Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Troubled Debt Restructurings) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) loans	Dec. 31, 2018 loans
Troubled debt restructurings:
Number of loans | loans	17	0
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 17,146
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 13,459
Commercial real estate — owner occupied
Troubled debt restructurings:
Number of loans | loans	2
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 3,774
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 3,614
Commercial and industrial
Troubled debt restructurings:
Number of loans | loans	15
Financing Receivable, Troubled Debt Restructuring, Premodification	$ 13,372
Financing Receivable, Troubled Debt Restructuring, Postmodification	$ 9,845

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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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Amount, before troubled debt restructuring, of financing receivable to be modified.

+ 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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