Note 11 - Equity-based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

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

	Years Ended December 31,
	2019					2018					2017
	Stock Awards			Weighted Average Award Date Fair Value		Stock Awards			Weighted Average Award Date Fair Value		Stock Awards			Weighted Average Award Date Fair Value
Outstanding at December 31, 2018		1,143,205		$	23.26		1,428,878		$	21.53		1,501,021		$	20.58
Period Activity:
Restricted stock units awarded		325,321			20.02		281,567			24.13		257,532			23.06
Performance stock units awarded		146,367			22.78		219,943			23.25		213,436			28.18
Restricted shares distributed		(76,686	)		18.26		—			—		(179,169	)		22.44
Restricted stock units distributed		(237,416	)		18.83		(312,182	)		17.47		(95,510	)		20.71
Performance stock units distributed		(111,155	)		25.85		(296,909	)		21.55		(49,672	)		21.95
Restricted shares forfeited		—			—		—			—		(1,084	)		23.01
Restricted stock units forfeited		(74,075	)		22.09		(90,896	)		21.79		(81,626	)		20.36
Performance stock units forfeited		(80,597	)		25.30		(87,196	)		25.95		(136,050	)		24.29
Outstanding at December 31, 2019		1,034,964		$	23.20		1,143,205		$	23.26		1,428,878		$	21.53

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

	Years Ended December 31,
	2019					2018					2017
	Deferred Stock Units			Weighted Average Award Date Fair Value		Deferred Stock Units			Weighted Average Award Date Fair Value		Deferred Stock Units			Weighted Average Award Date Fair Value
Outstanding at December 31, 2018		287,350		$	20.80		269,977		$	20.14		253,445		$	19.93
Period Activity:
Awarded		50,174			19.64		45,681			23.72		47,091			23.53
Distributed		(84,184	)		20.38		(28,308	)		19.22		(30,559	)		23.57
Outstanding at December 31, 2019		253,340		$	20.71		287,350		$	20.80		269,977		$	20.14

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

	Years Ended December 31,
	2019					2018					2017
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Outstanding, beginning of year		52,783		$	18.11		126,680		$	23.06		170,253		$	21.99
Exercised		(52,783	)		18.11		—			—		(43,573	)		18.87
Canceled/Expired		—			—		(73,897	)		26.60		—			—
Outstanding, end of year		—		$	—		52,783		$	18.11		126,680		$	23.06
Exercisable, end of year		—		$	—		52,783		$	18.11		126,680		$	23.06

Cash Proceeds Received and Tax Benefit from Share-based Payment Awards [Table Text Block]

	Years Ended December 31,
	2019		2018			2017
Amount received from stock option exercises	$	956	$	—		$	823
Total intrinsic value of stock option exercises (1)		129		—			370
Tax expense (benefit) of stock option exercises recorded in income tax expense		312		(1,556	)		(63	)
Aggregate intrinsic value of outstanding stock options		—		—			386
Aggregate intrinsic value of exercisable stock options		—		—			386