Stock-Based Compensation (Schedule Of Non-Cash Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total cost of non-cash compensation included in loss before provision for income taxes	$ 17,205	$ 13,968	$ 11,469
Amount charged against loss	17,205	13,968	11,469
Cost of Revenues [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total cost of non-cash compensation included in loss before provision for income taxes	230	187	187
Selling, General and Administrative Expenses [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total cost of non-cash compensation included in loss before provision for income taxes	$ 16,975	$ 13,781	$ 11,282