Loans and Allowance for Credit Losses Total Impaired Loans by Class Segments (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	$ 61,821,000
Unpaid principal balance, with related allowance	58,524,000
Unpaid Principal Balance	120,345,000	$ 125,098,000
Real-estate - commercial mortgage
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	16,337,000
Unpaid principal balance, with related allowance	19,319,000
Unpaid Principal Balance	35,656,000	33,166,000
Commercial
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	25,393,000
Unpaid principal balance, with related allowance	15,683,000
Unpaid Principal Balance	41,076,000	48,106,000
Real estate - residential mortgage
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	1,260,000
Unpaid principal balance, with related allowance	15,134,000
Unpaid Principal Balance	16,394,000	16,676,000
Construction
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	2,432,000
Unpaid principal balance, with related allowance	1,127,000
Unpaid Principal Balance	3,559,000	3,618,000
Real-estate - home equity
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	0
Unpaid principal balance, with related allowance	7,261,000
Unpaid Principal Balance	7,261,000	7,004,000
Equipment lease financing, other and overdrafts
Impaired Financing Receivables [Line Items]
Unpaid principal balance, with no related allowance	16,399,000
Unpaid principal balance, with related allowance	0
Unpaid Principal Balance	$ 16,399,000	$ 16,528,000

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Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=d3e5212-111524

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Amount of unpaid principal balance of impaired financing receivables for which there is no related allowance for credit losses.

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