Net Loss Per Share (Narrative) (Details) - $ / shares	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average exercise price (in usd per share)	$ 11.09	$ 11.09		$ 10.95
Effect of options to purchase common shares on diluted EPS, shares	1,429,142
Effect of option to purchase share of common stock on diluted net income per share	8,140,127	9,569,269	11,127,640
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average exercise price (in usd per share)	$ 9.02	$ 9.02