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Recently Issued and Adopted Accounting Pronouncements and Regulatory Items (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 | Jun. 30, 2017
Accounting Policies [Abstract] |  |
Excess tax benefit recognized | $ 0.7 | $ 1.3

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- Definition Effective Income Tax Rate Reconciliation Share-based Compensation, Excess Tax Benefit Amount + References No definition available. + Details
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- References No definition available. + Details
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