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Investments (Detail) - USD ($)
1 Months Ended 3 Months Ended
Dec. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Schedule of Cost-method Investments [Line Items]      
Investment in Topgolf, during the period $ 20,000,000 $ 282,000 $ 0
Investment in Topgolf 70,495,000 70,777,000  
Topgolf International Inc      
Schedule of Cost-method Investments [Line Items]      
Investment in Topgolf $ 70,495,000 $ 70,777,000  
Minimum      
Schedule of Cost-method Investments [Line Items]      
Percentage of ownership interest in Topgolf   14.00%