Note 2 - Acquisitions and Divestitures - Schedule of Business Acquisition Assets and Liabilities of Pinnacle Acquisition (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Oct. 15, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill	$ 1,083,287	$ 1,062,102		$ 888,224	$ 826,476
Pinnacle Acquisition [Member]
Current assets	64,161
Property and equipment	130,306
Other assets	(28)
Intangible assets	454,400
Total acquired assets	648,839
Current liabilities	54,434
Other liabilities	57,832
Total liabilities assumed	112,266
Net identifiable assets acquired	536,573
Goodwill	78,560
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total	615,133		$ 615,100
Pinnacle Acquisition [Member] | Previously Reported [Member]
Current assets		64,604
Property and equipment		167,000
Other assets		(28)
Intangible assets		415,400
Total acquired assets		646,976
Current liabilities		54,585
Other liabilities		57,832
Total liabilities assumed		112,417
Net identifiable assets acquired		534,559
Goodwill		72,740
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total		$ 607,299
Pinnacle Acquisition [Member] | Restatement Adjustment [Member]
Current assets	(443)
Property and equipment	(36,694)
Other assets	0
Intangible assets	39,000
Total acquired assets	1,863
Current liabilities	(151)
Other liabilities	0
Total liabilities assumed	(151)
Net identifiable assets acquired	2,014
Goodwill	5,820
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net, Total	$ 7,834