Income Taxes - Additional Information (Details) $ in Millions |
Sep. 30, 2017
USD ($)
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| Income Tax Disclosure [Abstract] | |
| Amount of unrecorded benefit | $ 23.5 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition The amount of the unrecognized tax benefit of a position taken for which it is reasonably possible that the total amount thereof will significantly increase or decrease within twelve months of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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