Note 22 - Stock Based Compensation - Outstanding and Exercisable Stock Options (Details)	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Options Outstanding Number Outstanding (in shares) | shares	5,399,184
Options Outstanding Weighted Average Remaining Contractual Life (Year)	4 years 9 months
Options Outstanding Weighted Average Exercise Price (in dollars per share)	$ 24.00
Options Exercisable Number Outstanding (in shares) | shares	4,698,936
Options Exercisable Weighted Average Remaining Contractual Life (Year)	4 years 1 month 13 days
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 22.75
Exercise Price Range 1 [Member]
Range of Exercise Price, Lower (in dollars per share)	15.01
Range of Exercise Price, Upper (in dollars per share)	$ 20.00
Options Outstanding Number Outstanding (in shares) | shares	1,269,604
Options Outstanding Weighted Average Remaining Contractual Life (Year)	2 years 3 months 3 days
Options Outstanding Weighted Average Exercise Price (in dollars per share)	$ 19.89
Options Exercisable Number Outstanding (in shares) | shares	1,260,418
Options Exercisable Weighted Average Remaining Contractual Life (Year)	2 years 2 months 26 days
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 19.90
Exercise Price Range 2 [Member]
Range of Exercise Price, Lower (in dollars per share)	20.01
Range of Exercise Price, Upper (in dollars per share)	$ 25.00
Options Outstanding Number Outstanding (in shares) | shares	2,894,522
Options Outstanding Weighted Average Remaining Contractual Life (Year)	4 years 11 months 19 days
Options Outstanding Weighted Average Exercise Price (in dollars per share)	$ 23.17
Options Exercisable Number Outstanding (in shares) | shares	2,891,460
Options Exercisable Weighted Average Remaining Contractual Life (Year)	4 years 11 months 15 days
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 23.17
Exercise Price Range 3 [Member]
Range of Exercise Price, Lower (in dollars per share)	25.01
Range of Exercise Price, Upper (in dollars per share)	$ 30.00
Options Outstanding Number Outstanding (in shares) | shares	804,440
Options Outstanding Weighted Average Remaining Contractual Life (Year)	5 years 6 months 29 days
Options Outstanding Weighted Average Exercise Price (in dollars per share)	$ 27.40
Options Exercisable Number Outstanding (in shares) | shares	516,440
Options Exercisable Weighted Average Remaining Contractual Life (Year)	4 years 3 days
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 26.78
Exercise Price Range 4 [Member]
Range of Exercise Price, Lower (in dollars per share)	30.01
Range of Exercise Price, Upper (in dollars per share)	$ 35.00
Options Outstanding Number Outstanding (in shares) | shares	30,618
Options Outstanding Weighted Average Remaining Contractual Life (Year)	3 years 29 days
Options Outstanding Weighted Average Exercise Price (in dollars per share)	$ 32.37
Options Exercisable Number Outstanding (in shares) | shares	30,618
Options Exercisable Weighted Average Remaining Contractual Life (Year)	3 years 29 days
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 32.37
Exercise Price Range 5 [Member]
Range of Exercise Price, Lower (in dollars per share)	35.01
Range of Exercise Price, Upper (in dollars per share)	$ 40.00
Options Outstanding Number Outstanding (in shares) | shares	400,000
Options Outstanding Weighted Average Remaining Contractual Life (Year)	9 years 7 months 2 days
Options Outstanding Weighted Average Exercise Price (in dollars per share)	$ 35.55
Options Exercisable Number Outstanding (in shares) | shares	0