Loans and Allowance for Credit Losses TDRs by Class Segment (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) loans	Sep. 30, 2019 USD ($) loans	Sep. 30, 2020 USD ($) loans	Sep. 30, 2019 USD ($) loans
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment | $	$ 14,189	$ 1,335	$ 43,577	$ 9,553
Number of Loans | loans	33	17	129	66
Real estate - residential mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment | $	$ 1,351	$ 830	$ 10,516	$ 2,263
Number of Loans | loans	8	1	48	6
Real estate - commercial mortgage
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment | $	$ 8,394	$ 81	$ 24,868	$ 81
Number of Loans | loans	5	1	12	1
Real-estate - home equity
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment | $	$ 1,370	$ 327	$ 3,556	$ 2,281
Number of Loans | loans	13	12	40	46
Commercial
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment | $	$ 3,021	$ 97	$ 4,399	$ 4,928
Number of Loans | loans	4	3	18	13
Consumer
Financing Receivable, Troubled Debt Restructuring [Line Items]
Post-Modification Recorded Investment | $	$ 53	$ 0	$ 238	$ 0
Number of Loans | loans	3	0	11	0