Note 15 - Share-based Compensation (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

Share-based Payment Arrangement, Option, Activity [Table Text Block]

						Weighted-
						average
				Weighted-		remaining		Aggregate
	Number			average		contractual		intrinsic
	of shares			exercise		term in		value
	(in thousands)			price		years		(in thousands)
Options Outstanding as of December 31, 2020		17,095		$	21.60
Granted
Exercised		(2,667	)		18.89
Forfeited and Expired		(153	)		23.39
Options Outstanding as of March 31, 2021		14,275			22.08		7.24	$	305,893
Options Expected to Vest as of March 31, 2021		14,118			22.10		7.22		302,266
Options Exercisable as of March 31, 2021		5,961			19.86		5.52		140,984

Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

				Weighted
	Number			average
	of shares			grant-date
	(in thousands)			fair value
Non-vested shares and share units at December 31, 2020		12,943		$	22.87
Granted		316			36.42
Vested		(160	)		23.13
Forfeited		(216	)		24.33
Non-vested shares and share units at March 31, 2021		12,883		$	23.18

Share-based Payment Arrangement, Performance Shares, Activity [Table Text Block]

				Weighted
	Number			average
	of shares			grant-date
	(in thousands)			fair value
Non-vested share units at December 31, 2020		1,765		$	28.06
Granted		826			36.34
Vested		(26	)		28.06
Forfeited		(43	)		31.51
Non-vested share units at March 31, 2021		2,522		$	30.71