XML 89 R56.htm IDEA: XBRL DOCUMENT v3.19.3
Long-Term Debt - Unamortized Deferred Financing Costs - Additional Information (Detail)
$ in Millions
Sep. 30, 2019
USD ($)
New Revolving Credit Facility [Member]  
Line Of Credit Facility [Line Items]  
Unamortized deferred financing costs $ 5.0