Note 14 - Segment Information - Revenues for Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Total Revenues	$ 833,131	$ 819,568	$ 846,132	$ 827,288	$ 791,623	$ 612,196	$ 616,793	$ 606,118	$ 3,326,119	$ 2,626,730	$ 2,400,819
Casino [Member]
Total Revenues									2,483,293	1,925,424	1,740,268
Food and Beverage [Member]
Total Revenues									447,853	367,888	346,379
Occupancy [Member]
Total Revenues									237,187	199,500	186,795
Product and Service, Other [Member]
Total Revenues									157,786	133,918	127,377
Las Vegas Locals [Member]
Total Revenues									880,935	873,504	868,377
Las Vegas Locals [Member] | Casino [Member]
Total Revenues									566,443	565,579	563,785
Las Vegas Locals [Member] | Food and Beverage [Member]
Total Revenues									156,932	155,107	154,451
Las Vegas Locals [Member] | Occupancy [Member]
Total Revenues									105,619	100,110	98,406
Las Vegas Locals [Member] | Product and Service, Other [Member]
Total Revenues									51,941	52,708	51,735
Downtown Las Vegas [Member]
Total Revenues									257,667	248,110	244,441
Downtown Las Vegas [Member] | Casino [Member]
Total Revenues									138,623	132,870	133,072
Downtown Las Vegas [Member] | Food and Beverage [Member]
Total Revenues									57,732	55,767	54,451
Downtown Las Vegas [Member] | Occupancy [Member]
Total Revenues									28,784	26,943	24,623
Downtown Las Vegas [Member] | Product and Service, Other [Member]
Total Revenues									32,528	32,530	32,295
Midwest and South [Member]
Total Revenues									2,187,517	1,505,116	1,288,001
Midwest and South [Member] | Casino [Member]
Total Revenues									1,778,227	1,226,975	1,043,411
Midwest and South [Member] | Food and Beverage [Member]
Total Revenues									233,189	157,014	137,477
Midwest and South [Member] | Occupancy [Member]
Total Revenues									102,784	72,447	63,766
Midwest and South [Member] | Product and Service, Other [Member]
Total Revenues									$ 73,317	$ 48,680	$ 43,347