Derivative Financial Instruments (Balance Sheet Category and Fair Values of Embedded Derivatives) (Details)			12 Months Ended
	Dec. 31, 2016 shares	Feb. 05, 2016 USD ($) shares	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) shares
Derivative [Line Items]
Number of shares to be issued upon conversion (in shares) | shares	20,481	73,394		20,481
Other noninterest income
Derivative [Line Items]
Amount of gain (loss)			$ 339,000	$ 366,000
Other noninterest income | Embedded conversion option
Derivative [Line Items]
Notional Amount			0
Amount of gain (loss)			0	422,000
Other assets
Derivative [Line Items]
Notional Amount			11,266,000	14,045,000
Fair Value, embedded derivative asset			453,000	$ 738,000
Other liabilities
Derivative [Line Items]
Notional Amount		$ 2,000,000	2,231,000
Fair Value, embedded derivative liability			$ (54,000)