Note 20 - Stock Based Compensation - Outstanding and Exercisable Stock Options (Details)	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Options Outstanding Number Outstanding (in shares) | shares	6,152,123
Options Outstanding Weighted Average Remaining Contractual Life (Year)	5 years 222 days
Options Outstanding Weighted Average Exercise Price (in dollars per share)	$ 28.23
Options Exercisable Number Outstanding (in shares) | shares	3,861,157
Options Exercisable Weighted Average Remaining Contractual Life (Year)	4 years 3 days
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 28.96
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
Options Outstanding Number Outstanding (in shares) | shares	42,000
Options Outstanding Weighted Average Remaining Contractual Life (Year)	5 years 25 days
Options Outstanding Weighted Average Exercise Price (in dollars per share)	$ 19.95
Options Exercisable Number Outstanding (in shares) | shares	42,000
Options Exercisable Weighted Average Remaining Contractual Life (Year)	5 years 25 days
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 19.95
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
Options Outstanding Number Outstanding (in shares) | shares	1,215,375
Options Outstanding Weighted Average Remaining Contractual Life (Year)	5 years 160 days
Options Outstanding Weighted Average Exercise Price (in dollars per share)	$ 23.21
Options Exercisable Number Outstanding (in shares) | shares	1,119,346
Options Exercisable Weighted Average Remaining Contractual Life (Year)	5 years 76 days
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 23.25
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
Options Outstanding Number Outstanding (in shares) | shares	3,424,748
Options Outstanding Weighted Average Remaining Contractual Life (Year)	7 years 29 days
Options Outstanding Weighted Average Exercise Price (in dollars per share)	$ 27.47
Options Exercisable Number Outstanding (in shares) | shares	1,249,937
Options Exercisable Weighted Average Remaining Contractual Life (Year)	4 years 321 days
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 28.16
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
Options Outstanding Number Outstanding (in shares) | shares	863,625
Options Outstanding Weighted Average Remaining Contractual Life (Year)	3 years 51 days
Options Outstanding Weighted Average Exercise Price (in dollars per share)	$ 31.82
Options Exercisable Number Outstanding (in shares) | shares	862,312
Options Exercisable Weighted Average Remaining Contractual Life (Year)	3 years 51 days
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 31.82
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
Options Outstanding Number Outstanding (in shares) | shares	606,375
Options Outstanding Weighted Average Remaining Contractual Life (Year)	1 year 83 days
Options Outstanding Weighted Average Exercise Price (in dollars per share)	$ 38.02
Options Exercisable Number Outstanding (in shares) | shares	587,562
Options Exercisable Weighted Average Remaining Contractual Life (Year)	1 year 29 days
Options Exercisable Weighted Average Exercise Price (in dollars per share)	$ 38.04