Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net Loss Attributable to Parent		$ (11,188)	$ (8,560)
Weighted average common shares outstanding, basic		39,433	39,215
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	[1]	0	0
Weighted average common shares outstanding, diluted		39,433	39,215
Basic (in dollars per share)		$ (0.28)	$ (0.22)
Diluted (in dollars per share)		$ (0.28)	$ (0.22)

[1] Due to the net loss for the three months ended March 31, 2016 and 2015, restricted stock units and common stock options representing approximately 544,000 and 598,000, respectively, have been excluded from the number of shares used in calculating diluted net loss per share, as their inclusion would be antidilutive.