Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Numerator (for basic and diluted earnings per share)
Net loss	$ (11,809)	$ (6,814)
Income allocated to RSUs	0	0
Numerator for basic and diluted earnings per share	$ (11,809)	$ (6,814)
Denominator
Basic weighted-average shares outstanding	81,077	80,673
Effect of dilutive securities:
Restricted stock units	0	0
Diluted weighted-average shares outstanding	81,077	80,673

Undistributed Earnings (Loss) Allocated to Participating Securities, Basic and Diluted

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Amount after tax of income (loss) from continuing operations attributable to the parent.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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