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

9 Months Ended

Sep. 30, 2019

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, 2018		1,143,205		$	23.26
Period Activity:
Restricted stock units awarded		323,939			20.03
Performance stock units awarded		146,367			22.78
Restricted stock units distributed		(222,745	)		18.65
Performance stock units distributed		(111,155	)		25.85
Restricted stock units forfeited		(40,994	)		22.61
Performance stock units forfeited		(63,818	)		25.35
Outstanding at September 30, 2019		1,174,799		$	22.84

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, 2018		287,350		$	20.80
Period Activity:
Awarded		47,767			19.59
Distributed		(84,184	)		20.38
Outstanding at September 30, 2019		250,933		$	20.71