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Commitments and Off-balance Sheet Items (Narrative) (Details)
12 Months Ended
Dec. 31, 2018
Minimum  
Commitments and Contingent Liabilities [Line Items]  
Loans and Leases Receivable Fixed Commitment Interest Rates 2.00%
Loans and Leases Receivable Fixed Commitment Maturity 1 year
Maximum  
Commitments and Contingent Liabilities [Line Items]  
Loans and Leases Receivable Fixed Commitment Interest Rates 21.00%
Loans and Leases Receivable Fixed Commitment Maturity 32 years