Allowance for Loan and Lease Losses and Credit Quality Information - Consumer Real Estate Loans to Customers in Bankruptcy (Details) - Consumer real estate - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Consumer Real Estate Loans to Customers in Bankruptcy
0-59 days delinquent and accruing	$ 3,306	$ 7,324
Non-accrual	9,046	10,552
Total consumer real estate loans to customers in bankruptcy	$ 12,352	$ 17,876

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