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Impact of Change in Accounting Policies - Additional Information (Details) $ in Millions	Dec. 31, 2018 USD ($)
Revenue from Contract with Customer [Abstract]
Commission costs	$ 12.0
Deferred tax asset, cumulative impact of non-tax adjustments from adoption of ASC 606	$ 6.9

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- Definition

Deferred Tax Asset, Cumulative Impact Of Non-Tax Adjustments From Adoption Of ASC 606

+ References

No definition available.

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- Definition

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

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- References

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