Stock-Based Compensation (Schedule Of Stock Option Activity Under The Plans) (Details) - Stock Options [Member]	9 Months Ended
	Sep. 30, 2015 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding unvested as of January 1, 2015	2,042,074
Number of Shares, Forfeited/canceled/expired	(1,562,791)
Number of Shares, Exercised	(479,283)
Outstanding unvested as of September 30, 2015	0
Outstanding as of January 1, 2015 | $ / shares	$ 10.93
Weighted-Average Exercise Price, Forfeited/canceled/expired | $ / shares	12.98
Weighted-Average Exercise Price, Exercised | $ / shares	4.24
Outstanding as of September 30, 2015 | $ / shares	$ 0.00