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General Information - Additional Information (Detail) - USD ($)
$ in Thousands
Apr. 25, 2019
Mar. 31, 2019
Jan. 01, 2019
Property Plant And Equipment [Line Items]      
Operating lease assets   $ 157,000  
Operating lease liabilities   $ 143,050  
ASU 2016-02 [Member]      
Property Plant And Equipment [Line Items]      
Operating lease assets     $ 146,800
Operating lease liabilities     $ 146,800
Subsequent Event [Member]      
Property Plant And Equipment [Line Items]      
Outstanding common stock owned by loews corporation 53.00%