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Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 8.6us-gaap_LeaseAndRentalExpense	$ 7.1us-gaap_LeaseAndRentalExpense	$ 5.6us-gaap_LeaseAndRentalExpense
Percentage of weighted average cost of capital	15.00%us-gaap_FairValueInputsDiscountRate	15.50%us-gaap_FairValueInputsDiscountRate
Restructuring charges		$ 1.9us-gaap_RestructuringCharges	$ 1.5us-gaap_RestructuringCharges

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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