Equity Compensation (Options Activity) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding at beginning of period (in shares)	3,600,132
Granted (in shares)	0
Excercised (in shares)	(14,450)
Canceled (in shares)	(61,637)
Options outstanding at end of period (in shares)	3,524,045
Weighted Average Exercise Price
Options outstanding at beginning of period - Weighted Average Exercise Price (in dollars per share)	$ 22.74
Granted - Weighted Average Exercise Price (in dollars per share)	$ 0
Excercised - Weighted Average Exercise Price (in dollars per share)	$ 13.87
Canceled - Weighted Average Exercise Price (in dollars per share)	$ 28.58
Options outstanding at end of period - Weighted Average Exercise Price (in dollars per share)	$ 22.65
Options exercisable at end of period (in shares)	2,896,375
Stock Options
Weighted Average Exercise Price
Options outstanding at end of period - Weighted Average Exercise Price (in dollars per share)	$ 22.65
Options available for grant at end of period (in shares)	2,816,470	[1]

[1] *Shares available for grant as of March 31, 2015 reduced by net restricted stock and restricted stock unit award and performance share and performance share unit award activity of 1,024,246 shares and 610,644 shares, respectively during the quarter.