Note 11 - Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Note 11 - Stock-Based Compensation (Tables) [Line Items]

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

	Shares			Weighted-Average Grant-Date Fair Value
Non-vested at December 31, 2013		346,584		$	14.08
Granted		266,895			20.17
Vested		(220,863	)		16.80
Forfeited		(19,462	)		15.59
Non-vested at December 31, 2014		373,154		$	16.75
Vested but unissued at December 31, 2014		233,836		$	16.93

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

(In thousands, except grant date fair value)	2014		2013		2012
Proceeds from stock options exercised	$	565	$	533	$	885
Fair value of shares received upon exercise of stock options		1,962		6,814		905
Tax benefit related to stock options exercised		88		151		56
Intrinsic value of stock options exercised		488		1,228		256
Weighted average fair value on grant date		n/a		n/a		n/a

Non-Full Value Awards [Member]

Note 11 - Stock-Based Compensation (Tables) [Line Items]

Schedule of Share-based Compensation, Activity [Table Text Block]

	Shares			Weighted- Average Exercise Price		Weighted-Average Remaining Contractual (years)			Aggregate Intrinsic Value $(000) *
Outstanding at December 31, 2013		306,630		$	16.02
Granted		-			-
Exercised		(150,115	)		16.83
Forfeited		(1,600	)		19.37
Outstanding at December 31, 2014		154,915		$	15.19		3.2	$	787
Exercisable shares at December 31, 2014		154,915		$	15.19		3.2	$	787

Phantom Share Units (PSUs) [Member]

Note 11 - Stock-Based Compensation (Tables) [Line Items]

Schedule of Share-based Compensation, Activity [Table Text Block]

Phantom Stock Plan	Shares			Fair Value
Outstanding at December 31, 2013		59,323		$	20.70
Granted		9,631			19.85
Forfeited		(56	)		19.73
Distributions		(1,785	)		19.60
Outstanding at December 31, 2014		67,113		$	20.27
Vested at December 31, 2014		66,996		$	20.27