Summary of Significant Accounting Policies (Summary Of Gross Carrying Value And Accumulated Amortization Related To The Company's Intangible Items) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 13,823	$ 13,823
Accumulated Amortization	8,894	7,595
Customer List Intangible [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	12,006	12,006
Accumulated Amortization	8,004	7,003
Software Intangible [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,817	1,817
Accumulated Amortization	$ 890	$ 592