Note 15 - Share-based Compensation - Summary of Stock Options Outstanding (Details) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	15 Months Ended
	Sep. 30, 2021 USD ($) $ / shares shares	Sep. 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
Granted (in shares) | shares	0	0
Granted, weighted average exercise price (in dollars per share) | $ / shares	$ 0
Exercised, number of shares (in shares) | shares	(4,464)
Exercised, weighted average exercise price (in dollars per share) | $ / shares	$ 20.17
Forfeited and Expired, number of shares (in shares) | shares	(324)
Forfeited and Expired, weighted average exercise price (in dollars per share) | $ / shares	$ 21.98
Ending Options Outstanding, number of shares (in shares) | shares	12,307	12,307
Ending Options Outstanding, weighted average exercise price (in dollars per share) | $ / shares	$ 22.10	$ 22.10
Options Outstanding, weighted average remaining contractual term (Year)	6 years 8 months 26 days
Options Outstanding, aggregate intrinsic value | $	$ 176,960	$ 176,960
Options Expected to Vest, number of shares (in shares) | shares	12,206	12,206
Options Expected to Vest, weighted average exercise price (in dollars per share) | $ / shares	$ 22.13	$ 22.13
Options Expected to Vest, weighted average remaining contractual term (Year)	6 years 8 months 19 days
Options Expected to Vest, aggregate intrinsic value | $	$ 175,319	$ 175,319
Options Exercisable, number of shares (in shares) | shares	6,919	6,919
Options Exercisable, weighted average exercise price (in dollars per share) | $ / shares	$ 20.90	$ 20.90
Options Exercisable, weighted average remaining contractual term (Year)	5 years 6 months 10 days
Options Exercisable, aggregate intrinsic value | $	$ 107,865	$ 107,865