Derivatives (Narrative) (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) agreement	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Derivative [Line Items]
Notional Amount	$ 68,700,000
Cash collateral	$ 400,000	$ 3,600,000
Interest Rate Swap [Member]
Derivative [Line Items]
Number of interest rate swap agreements | agreement	13
Fair value adjustment on derivatives	$ 984,000	(1,400,000)	$ 436,000
Payable under agreements	$ 60,000	$ 1,100,000