Other Balance Sheet And Statement Of (Loss) Earnings Captions (Accrued Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	$ 13,592	$ 12,486
Accrued Commissions (AGLC) [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	863
Progressive Slot, Table And On Track Liability [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	3,340	3,105
Player Point Liability [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	1,006	1,016
Chip Liability [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	592	542
Racing-Related Liabilities [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	1,068	1,046
Deposit Liability [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	420	309
Other Accrued Liabilities [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	$ 6,303	$ 6,468