FHLB Advances, Other Borrowings and Subordinated Notes (Summary of Pledged Securities Related to Securities Sold Under Repurchase Agreements) (Details) - Securities sold under repurchase agreements - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged financial instruments	$ 22,300
Securities sold under agreements to repurchase	10,200	$ 50,600	$ 21,400
Overnight Sweep Collateral
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged financial instruments	22,295
Excess collateral	12,113
Securities sold under agreements to repurchase	10,182
Overnight Sweep Collateral | Available-for-sale securities pledged | Mortgage-backed securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged financial instruments	9,257
Overnight Sweep Collateral | Available-for-sale securities pledged | Collateralized mortgage obligations
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged financial instruments	3,038
Overnight Sweep Collateral | Held-to-maturity securities pledged | U.S. Government agencies
Financial Instruments Owned and Pledged as Collateral [Line Items]
Pledged financial instruments	$ 10,000