New Accounting Pronouncements - Narrative (Details) $ in Millions	6 Months Ended
Jun. 30, 2017 USD ($)
Accounting Policies [Abstract]
Share-based compensation, excess tax benefit	$ 0.3

Effective Income Tax Rate Reconciliation, Share-based Compensation, Excess Tax Benefit, Amount

No definition available.

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Balance Type:	credit
Period Type:	duration