Loans and Allowance for Credit Losses Troubled Debt Restructuring Modification (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) loans	Jun. 30, 2018 USD ($) loans	Jun. 30, 2019 USD ($) loans	Jun. 30, 2018 USD ($) loans
Financing Receivable, Modifications [Line Items]
Number of Loans | loans	29	31	49	60
Post-Modification Recorded Investment | $	$ 4,012	$ 1,789	$ 8,218	$ 12,537
Commercial
Financing Receivable, Modifications [Line Items]
Number of Loans | loans	6	2	10	11
Post-Modification Recorded Investment | $	$ 2,371	$ 53	$ 4,831	$ 9,412
Real-estate - home equity
Financing Receivable, Modifications [Line Items]
Number of Loans | loans	22	28	34	47
Post-Modification Recorded Investment | $	$ 1,125	$ 1,659	$ 1,954	$ 3,043
Residential Mortgage [Member]
Financing Receivable, Modifications [Line Items]
Number of Loans | loans	1	1	5	2
Post-Modification Recorded Investment | $	$ 516	$ 77	$ 1,433	$ 82