Note 9 - Stockholders' Equity and Equity Compensation (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

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

	Stock Awards			Weighted Average Award Date Fair Value
Outstanding at December 31, 2019		1,034,964		$	23.20
Period Activity:
Restricted stock units awarded		405,453			19.89
Performance stock units awarded		131,755			22.96
Restricted stock units distributed		(198,433	)		22.24
Performance stock units distributed		(71,541	)		28.18
Restricted stock units forfeited		(33,297	)		21.01
Performance stock units forfeited		(76,282	)		27.46
Outstanding at September 30, 2020		1,192,619		$	21.70

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

	Deferred Stock Units			Weighted Average Award Date Fair Value
Outstanding at December 31, 2019		253,340		$	20.71
Period Activity:
Awarded		67,056			14.61
Distributed		(58,267	)		21.63
Outstanding at September 30, 2020		262,129		$	18.95