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Newly Adopted Accounting Pronouncements (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($)
Accounting Changes and Error Corrections [Abstract]
Discrete tax benefits	$ 1,168

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- Definition

Effective Income Tax Rate Reconciliation, Share Based Compensation, Excess Tax Benefit, Amount

+ References

No definition available.

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- References

No definition available.

+ Details

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