Goodwill And Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 14,160	$ 12,597
Accumulated Amortization	(7,698)	(6,108)
Net Carrying Value	6,463	6,489
Weighted Average Useful Life (in Years)	3 years 6 months	4 years 10 months 24 days
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,152	7,490
Accumulated Amortization	(4,587)	(3,480)
Net Carrying Value	3,566	4,010
Weighted Average Useful Life (in Years)	3 years 7 months 6 days	4 years 7 months 6 days
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,267	3,267
Accumulated Amortization	(2,110)	(1,853)
Net Carrying Value	1,157	1,414
Weighted Average Useful Life (in Years)	4 years 6 months	5 years 9 months 18 days
Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,874	1,840
Accumulated Amortization	(1,001)	(775)
Net Carrying Value	873	1,065
Weighted Average Useful Life (in Years)	3 years 1 month 6 days	5 years 2 months 12 days
Software Development Costs [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	867
Net Carrying Value	$ 867
Weighted Average Useful Life (in Years)	3 years