Other Borrowings (Schedule of Financial Instruments Owned and Pledged as Collateral) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	$ 107,267
Excess collateral	45,458
Securities Sold under Agreements to Repurchase
Debt Instrument [Line Items]
Securities sold under repurchase agreements	61,809	$ 58,900
Available-for-sale securities | Corporate notes, financial issuers
Debt Instrument [Line Items]
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	2,983
Available-for-sale securities | Mortgage-backed securities
Debt Instrument [Line Items]
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	89,284
Held-to-maturity securities | US Government agencies
Debt Instrument [Line Items]
Financial Assets Sold under Agreements to Repurchase, Gross Including Not Subject to Master Netting Arrangement	$ 15,000