Note 7 - Equity-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2012

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

	For the Years Ended December 31,
	2012					2011					2010
	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, beginning of period		643,117		$	17.44		888,855		$	15.25		806,643		$	13.64
Restricted shares awarded		239,523			18.07		168,018			26.41		184,656			22.87
Restricted stock units awarded		222,379			18.11		6,768			26.60		17,115			24.97
Restricted shares distributed		(289,001	)		13.42		(270,142	)		13.38		(22,838	)		13.12
Restricted stock units distributed		(15,177	)		14.32		(9,934	)		11.19		(32,156	)		19.34
Restricted shares forfeited		(36,325	)		20.13		(140,448	)		23.01		(46,457	)		18.12
Restricted stock units forfeited		(65,647	)		18.18		–			–		(18,108	)		14.53
Outstanding, end of period		698,869		$	19.39		643,117		$	17.44		888,855		$	15.25

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

	For the Years Ended December 31,
	2012					2011					2010
	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, beginning of period		173,916		$	20.12		163,318		$	19.43		147,374		$	18.22
Awarded		41,734			17.78		31,238			23.75		25,175			26.10
Shares distributed		(34,132	)		22.90		(20,640	)		20.13		(9,231	)		18.38
Outstanding, end of period		181,518		$	19.06		173,916		$	20.12		163,318		$	19.43

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

	2012					2011					2010
	Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price		Shares			Weighted Average Exercise Price
Outstanding at January 1		1,107,712		$	18.98		1,198,516		$	18.42		1,167,640		$	17.71
Granted		281,696			18.11		225,505			26.92		215,722			22.87
Exercised		(52,676	)		16.66		(128,052	)		16.48		(132,485	)		17.16
Forfeited/expired		(119,923	)		23.21		(188,257	)		26.62		(52,361	)		25.53
Outstanding at December 31		1,216,809		$	18.46		1,107,712		$	18.98		1,198,516		$	18.42
Exercisable at December 31		758,270		$	16.80		690,449		$	16.82		678,649		$	19.37

Stock Options Additional Disclosure [Table Text Block]

	Years Ended December 31,
	2012		2011		2010
			(in millions)
Amount collected from stock option exercises	$	0.9	$	2.1	$		2.3
Total intrinsic value of stock option exercises		0.2		1.1			1.2
Tax benefit of stock option exercises recorded in additional paid-in-capital		0.1		0.1		<	0.1
Aggregate intrinsic value of outstanding stock options		3.4		1.0			8.6
Aggregate intrinsic value of exercisable stock options		2.3		0.8			4.5

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

	2012								2011								2010
	Range					Weighted Average			Range					Weighted Average			Range			Weighted Average
Weighted average grant-date fair value	$	8.14	-	8.19		$	8.19				n/a			$	11.61			n/a		$	10.56
Volatility		43.0	–	45.2	%		45.1	%		47.0	-	50.6	%		50.4	%		50.4	%		50.4	%
Expected term (years)			7.0				7.0				7.0				7.0			7.0			7.0
Dividend yield			0.0%				0.0	%			0.0%				0.0	%		0.0	%		0.0	%
Risk-free rate		1.0	-	1.5	%		1.5	%		2.3	-	3.0	%		2.8	%		3.1	%		3.1	%