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

6 Months Ended

Jun. 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		391,171			20.02
Performance stock units awarded		131,755			22.96
Restricted stock units distributed		(188,545	)		22.30
Performance stock units distributed		(71,541	)		28.18
Restricted stock units forfeited		(28,928	)		21.07
Performance stock units forfeited		(76,282	)		27.46
Outstanding at June 30, 2020		1,192,594		$	21.76

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		64,010			14.55
Distributed		(56,582	)		21.63
Outstanding at June 30, 2020		260,768		$	19.00