Fair Value Of Assets And Liabilities (Narrative) (Details) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 USD ($) number	Jun. 30, 2015 USD ($)
Fair Value Of Assets And Liabilities [Abstract]
Gain/(loss) on instrument specific credit risk	$ 200		$ 300	$ 300	$ 700
Number of levels assets and liabilities are grouped in | number				3
Long-lived asset impairment		$ 3,700