Derivative Financial Instruments (Balance sheet category and fair values of embedded derivatives) (Details) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Derivative [Line Items]
Notional Amount	$ 14,903	$ 15,020
Year-to-Date Gain (Loss) Recognized	272	$ 0
Other noninterest income
Derivative [Line Items]
Year-to-Date Gain (Loss) Recognized	(100)
Other Liabilities
Derivative [Line Items]
Notional Amount	2,000
Fair Value	$ (422)