Stock-Based Compensation (Schedule Of Stock Option Activity Under The Plans) (Details) (USD $)	6 Months Ended
	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding unvested as of June 30, 2014	1,580,447
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding unvested as of January 1, 2014	1,916,718
Number of Shares, Granted	145,034
Number of Shares, Forfeited/canceled/expired	(164,572)
Number of Shares, Exercised	(316,733)
Outstanding as of January 1, 2014	$ 12.47
Weighted-Average Exercise Price, Granted	$ 11.56
Weighted-Average Exercise Price, Forfeited/canceled/expired	$ 8.88
Weighted-Average Exercise Price, Exercised	$ 11.60
Outstanding unvested as of June 30, 2014	$ 13.19