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Significant Accounting Policies - Additional Information (Detail)
Sep. 30, 2020
ASU 2018-13 [Member]  
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true
Change in Accounting Principle, Accounting Standards Update, Adoption Date Jan. 01, 2020
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] true
ASU 2018-15 [Member]  
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true
Change in Accounting Principle, Accounting Standards Update, Adoption Date Jan. 01, 2020
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] true
ASU 2018-17 [Member]  
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true
Change in Accounting Principle, Accounting Standards Update, Adoption Date Jan. 01, 2020
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] true
ASU 2018-18 [Member]  
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Change in Accounting Principle, Accounting Standards Update, Adopted [true false] true
Change in Accounting Principle, Accounting Standards Update, Adoption Date Jan. 01, 2020
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false] true
ASU 2016-13 [Member]  
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false] true
ASU 2019-05 [Member]  
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]  
Change in Accounting Principle, Accounting Standards Update, Early Adoption [true false] true