Net (Loss) Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Income (Loss) (Numerator) [Abstract]
Net (loss) income basic and diluted	$ (10,014)	$ 36,975	$ (31,965)	$ 16,589
Net Income Available to Common Stockholders, Basic		36,975		16,589
Dilutive effect of contingent consideration liability		500		0
Net Income Available to Common Stockholders, Diluted		$ 37,475		$ 16,589
Weighted Average Common Shares (Denominator) Abstract
Shares outstanding, basic and diluted (in shares)	69,705		69,663
Weighted Average Number of Shares Outstanding, Basic	69,705	69,556	69,663	67,712
Dilutive effect of contingent consideration liability (shares)		3,295		0
Weighted Average Number Diluted Shares Outstanding Adjustment		28		15
Weighted Average Number of Shares Outstanding, Diluted	69,705	72,879	69,663	67,727
Per share amount [Abstract]
Net loss per share, basic and diluted (in dollars per share)	$ (0.14)		$ (0.46)
Earnings Per Share, Basic	(0.14)	$ 0.53	(0.46)	$ 0.24
Earnings Per Share, Diluted	$ (0.14)	$ 0.51	$ (0.46)	$ 0.24
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted Average Number (in shares)	8,846	5,267	9,193	8,652
Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted Average Number (in shares)	6,487	5,267	6,484	5,357
Weighted Average Exercise Price (in dollars per share)	$ 9.46	$ 10.23	$ 9.77	$ 10.31
Contingent Consideration Liability [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted Average Number (in shares)	2,359	0	2,709	3,295