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Equity - Non-Controlling Interest (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at December 31, 2017	$ 484,550
Net loss attributable to non-controlling interest	(648)	$ 0
Balance at March 31, 2018	478,099
Non-Controlling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at December 31, 2017	48,931
Net loss attributable to non-controlling interest	(648)
Other comprehensive income	24
Balance at March 31, 2018	$ 48,307

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount of Net Income (Loss) attributable to noncontrolling interest.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
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Amount after tax of other comprehensive income (loss) attributable to noncontrolling interests.

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- Definition

Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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