Note 6 - Stockholders' Equity and Equity Compensation (Tables)

6 Months Ended

Jun. 30, 2013

Shareholders' Equity and Share-based Payments [Text Block]

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

	Stock Awards			Weighted Average Award Date Fair Value
Outstanding at January 1, 2013		701,918		$	19.42
Restricted shares awarded		398,497			24.15
Restricted stock units awarded		112,401			25.11
Restricted shares distributed		(274,028	)		19.03
Restricted stock units distributed		(11,112	)		20.70
Restricted shares forfeited		(13,992	)		20.76
Restricted stock units forfeited		(52,434	)		20.39
Outstanding at June 30, 2013		861,250		$	22.38

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

	Deferred Stock Units			Weighted Average Award Date Fair Value
Outstanding at January 1, 2013		181,518		$	19.06
Awarded		39,876			22.33
Shares distributed		(3,171	)		21.78
Forfeited	–			–
Outstanding at June 30, 2013		218,223		$	19.62

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

	Shares			Weighted Average Exercise Price
Outstanding at January 1, 2013		1,223,618		$	18.49
Granted		29,025			25.11
Exercised		(29,511	)		20.14
Canceled/Expired		(7,150	)		24.36
Outstanding at June 30, 2013		1,215,982		$	18.58
Exercisable at June 30, 2013		936,863		$	17.89

Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity [Table Text Block]

	For the Six Months Ended June 30,
	2013		2012
Amount collected from stock option exercises	$	738	$	456
Total intrinsic value of stock option exercises		131		103
Tax benefit of stock option exercises recorded in additional paid-in-capital		55		12
Aggregate intrinsic value of outstanding stock options		2,722		2,295
Aggregate intrinsic value of exercisable stock options		3,538		2,295

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Six Months Ended June 30,
	2013			2012
Weighted average grant-date fair value	$	12.92		$	8.19
Volatility		49.8	%		45.2	%
Expected term (years)		7.0			7.0
Dividend yield		0.0	%		0.0	%
Risk-free rate		1.1	%		1.5	%