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Commitments and Contingencies - Indemnification and loss contingencies (Details) $ in Thousands	Jan. 13, 2016	Oct. 09, 2015 complaint	Jul. 28, 2015	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2015 USD ($)
Indemnification clauses
Contingencies
Liabilities accrued				$ 0
Office of Foreign Assets Control
Contingencies
Transaction Period	5 years
Liabilities accrued						$ 900
Loss contingency accrual reversed					$ 900
Range of potential penalties assessed				$ 0
Beth Seltzer v. Hunt, et al.
Contingencies
Number of new claims filed | complaint		2
Pending Litigation | Putative Class Action Complaint
Contingencies
Number of days allowed to file amended complaint			60 days

X

- Definition

Amount of Loss contingency accrual reversed.

+ References

No definition available.

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- Definition

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+ References

No definition available.

+ Details

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- Definition

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+ References

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- Definition

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+ References

No definition available.

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- Definition

Amount of loss contingency liability.

+ References

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-Topic 450
-SubTopic 20
-Section 50
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- Definition

Reflects the estimated amount of loss from the specified contingency as of the balance sheet date.

+ References

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- Definition

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+ References

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