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Earnings per Share Basis and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Numerator
Net income (loss)	$ (20,477)	$ (14,230)
Denominator
Weighted average shares (basic)	30,226	29,375
Dilutive effect of potential common shares	0	0
Weighted average shares (diluted)	30,226	29,375
Basic earnings per share	$ (0.68)	$ (0.48)
Diluted earnings per share	$ (0.68)	$ (0.48)

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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