Other Balance Sheet And Statement Of Earnings Captions (Accrued Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	$ 15,664	$ 10,434
Other Accrued Liabilities [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	4,305	3,219
Accrued Commissions (AGLC) [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	2,262	2,401
Progressive Slot, Table And Track Liability [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	1,713	1,866
Player Point Liability [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	682	727
Chip Liability [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	721	477
Off-Track Betting Liability [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	355	522
Deposit Liability [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	2,716	1,002
Deferrred Rent [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	756	$ 220
Construction Liabilitiy [Member]
Accounts Payable And Accrued Liabilities [Line Items]
Accrued liabilities	$ 2,154