Loans (Not Covered by Share Agreements (Percentage)) (Details) - USD ($) $ in Millions |
12 Months Ended | |
---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Financing Receivable, Recorded Investment [Line Items] | ||
Loans delinquent 30-89 days as a percentage of total loans | 0.27% | 0.37% |
Loans secured by real estate property in process of foreclosure | $ 3.1 | |
Threshold period past due, nonperforming status of loans and leases | 90 days | |
Nonpass | ||
Financing Receivable, Recorded Investment [Line Items] | ||
Percent of nonaccrual loans | 16.00% | 17.00% |
Special Mention | ||
Financing Receivable, Recorded Investment [Line Items] | ||
Percent of loans | 52.00% | 47.00% |
Substandard | ||
Financing Receivable, Recorded Investment [Line Items] | ||
Percent of loans | 48.00% | 53.00% |