Description Of Business And Summary Of Significant Accounting Policies (Summary Of Capitalized Costs) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Internally Used Third-Party Software And Consulting Fees [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Capitalized software cost	$ 493	$ 426
Internally Developed Software [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Capitalized software cost	$ 17,523	$ 20,061