Federal Home Loan Bank Advances (Other Narratives) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Line of Credit Facility [Line Items]
Amortization of debt discount	$ 1,497	$ 1,496	$ 1,502
Short-term borrowings	19,000	$ 66,000
Additional borrowing capacity, Federal Home Loan Bank advances	200,000
Federal funds lines of credit at correspondent banks [Member]
Line of Credit Facility [Line Items]
Amount outstanding, line of credit	0
Federal funds lines of credit at correspondent banks [Member] | Unsecured debt [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity, line of credit	$ 67,000