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Derivative Instruments (Derivative Liabilities Offset in The consolidated Balance Sheets) (Details) - Non-hedging interest rate derivatives: - Interest Rate Swap $ in Thousands	Mar. 31, 2019 USD ($)
Customer Counterparties Loan Interest Rate Swap Liabilities
Offsetting Liabilities [Line Items]
Derivative liabilities	$ 7,007
Fair Value of collateral	7,007
Total Gross amounts not offset in the statement of financial position including applicable netting agreement and fair value of collateral	7,007
Net Amount	0
Derivative Liability, Fair Value, Gross Liability	7,007
Financial Institution Counterparties Loan Interest Rate Swap Liabilities
Offsetting Liabilities [Line Items]
Gross amounts of recognized liabilities	5,645
Derivative liabilities	6,475
Fair Value of collateral	830
Total Gross amounts not offset in the statement of financial position including applicable netting agreement and fair value of collateral	6,475
Net Amount	0
Derivative Liability, Fair Value, Gross Liability	$ 6,475

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