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

3 Months Ended

Mar. 31, 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		229,971			22.96
Performance stock units awarded		131,755			22.96
Restricted stock units distributed		(152,596	)		23.15
Performance stock units distributed		(71,541	)		28.18
Restricted stock units forfeited		(15,717	)		20.84
Performance stock units forfeited		(76,282	)		27.46
Outstanding at March 31, 2020		1,080,554		$	22.53

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		2,238		22.11
Distributed		—		—
Outstanding at March 31, 2020		255,578	$	20.72