Note 15 - Share-based Compensation - Summary of Stock Options Outstanding (Details) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($) $ / shares shares
Beginning Options Outstanding, number of shares (in shares) | shares	17,095
Beginning Options Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 21.60
Exercised, number of shares (in shares) | shares	(4,061)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 19.96
Forfeited and Expired, number of shares (in shares) | shares	(232)
Forfeited and Expired, weighted average exercise price (in dollars per share) | $ / shares	$ 22.50
Ending Options Outstanding, number of shares (in shares) | shares	12,802
Ending Options Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 22.10
Options Outstanding, weighted average remaining contractual term (Year)	7 years
Options Outstanding, aggregate intrinsic value | $	$ 240,623
Options Expected to Vest, number of shares (in shares) | shares	12,675
Options Expected to Vest, weighted average exercise price (in dollars per share) | $ / shares	$ 22.12
Options Expected to Vest, weighted average remaining contractual term (Year)	6 years 11 months 26 days
Options Expected to Vest, aggregate intrinsic value | $	$ 238,009
Options Exercisable, number of shares (in shares) | shares	7,310
Options Exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 20.96
Options Exercisable, weighted average remaining contractual term (Year)	5 years 10 months 6 days
Options Exercisable, aggregate intrinsic value | $	$ 145,729