Net (Loss) Income Per Share (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 1.75% Convertible Senior Subordinated Notes Due April 15, 2015 [Member]	Sep. 17, 2013 1.75% Convertible Senior Subordinated Notes Due April 15, 2015 [Member]
Net (Loss) Income Per Share [Line Items]
Antidilutive shares excluded from calculation	800,000.0	600,000.0	800,000.0	3,300,000.0
Notes, interest rate					1.75%
Convertible notes, maturity date					Apr. 15, 2015
Initial conversion price					$ 29.20	$ 29.20
Incremental common shares attributable to dilutive effect of conversion of debt securities			6,800,000	24,000,000