Other Balance Sheet And Statement Of Earnings Captions (Other Operating Revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Total	$ 10,128	$ 10,416	$ 8,201
Pari-Mutuel Revenue [Member]
Total	3,665	3,674	2,643
Bowling Revenue [Member]
Total	642	644	662
Other Revenue [Member]
Total	$ 5,821	$ 6,098	$ 4,896