Summary Of Significant Accounting Policies (Revenue Recognition) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Deferred Revenue Arrangement [Line Items]
Net out-of-period impact	$ 16,023	$ 17,007	$ 31,288	$ 31,447
NET REVENUE	48,222	50,683	96,429	95,163
Cost of goods sold	$ 32,199	$ 33,676	$ 65,141	$ 63,716
Minimum [Member]
Deferred Revenue Arrangement [Line Items]
Product maintenance contract term			12 months
Maximum [Member]
Deferred Revenue Arrangement [Line Items]
Product maintenance contract term			36 months
Net Revenue Derived From Services [Member]
Deferred Revenue Arrangement [Line Items]
Maximum percentage of total revenue			10.00%	10.00%