XML 42 R32.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Intangible Assets - Additional Information (Detail) | 3 Months Ended
--- | ---
Mar. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract] |
Intangible asset estimated weighted- average remaining useful life | 12 years 3 months 18 days

X
- Definition Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration