Share-Based Compensation (Summarized Information About Stock Awards) (Details) - $10.39 to $30.30 $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range - lower limit (in dollars per share) | $ / shares	$ 10.39
Exercise price range - upper limit (in dollars per share) | $ / shares	$ 30.30
Weighted average remaining contractual life of stock options outstanding	6 years 8 months 12 days
Aggregate intrinsic value of outstanding stock options	$ 30,541
Number of stock options exercisable (in shares) | shares	1,101
Weighted average remaining contractual life of stock options exercisable	4 years 10 months 24 days
Aggregate intrinsic value of options exercisable	$ 19,136
Aggregate intrinsic value of stock options exercised	$ 4,118