Stock-Based Compensation (Summary of Stock Options Activity) (Details) - Stock Options [Member]	3 Months Ended	9 Months Ended
	Sep. 30, 2015 $ / shares shares	Sep. 30, 2015 $ / shares shares
Number of Shares
Granted and Outstanding, Beginning of Period, Number of Shares | shares		1,989,000
Granted, Number of Shares | shares	0	259,000
Total Granted and Outstanding, End of Period, Number of Shares | shares	2,248,000	2,248,000
Approved for grant, Number of Shares | shares	722,000	722,000
Total Awarded and Outstanding, End of Period, Number of Shares | shares	2,970,000	2,970,000
Weighted Average Grant Date Fair Value
Granted and Outstanding, Beginning of Period, Weighted Average Grant Date Fair Value		$ 12.75
Granted, Weighted Average Grant Date Fair Value		12.48
Total Granted and Outstanding, End of Period, Weighted Average Grant Date Fair Value	$ 11.93	11.93
Total Awardeded and Outstanding, End of Period, Weighted Average Grant Date Fair Value		12.75
Weighted Average Exercise Price
Granted and Outstanding, Beginning of Period, Weighted Average Exercise Price		19.63
Granted, Weighted Average Exercise Price		16.07
Total Granted and Outstanding, End of Period, Weighted Average Exercise Price	19.22	19.22
Approved for grant, Weighted Average Exercise Price	20.58	20.58
Total Awarded and Outstanding, End of Period, Weighted Average Exercise Price	$ 19.55	$ 19.55