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Recently Issued Accounting Pronouncements - Additional Information (Detail) - USD ($)
$ in Thousands
Sep. 30, 2019
Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Right-of-use asset $ 67,632  
Short-term lease liability 20,575  
Long-term lease liability $ 47,294  
Accounting Standards Update 2016-02 [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Right-of-use asset   $ 71,042
Short-term lease liability   20,192
Long-term lease liability   $ 54,147