Investments (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Equity Securities, FV-NI and without Readily Determinable Fair Value [Abstract]
Investments in golf related ventures	$ 0	$ 282,000
Percentage of ownership interest in Topgolf	14.00%
Investment in Topgolf	$ 72,238,000		$ 72,238,000