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Note 10 - Stock Based Compensation (Tables)

12 Months Ended

Dec. 31, 2014

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

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

		Non-vested stock units				Weighted average grant date fair value
Balance, December 31, 2013			677,358			$	25.10
Granted			84,955				68.99
Vested			(288,042	)			45.20
Forfeited			(9,513	)			35.01
Balance, December 31, 2014			464,758			$	36.33

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

		Shares subject to options				Weighted average exercise price				Aggregate intrinsic value (millions)				Weighted average remaining contractual term (years)
Balance, December 31, 2013			58,884			$	6.53			$	3.7				0.7
Granted			-
Forfeited			-
Expired			-
Exercised			(52,050	)			6.50
Balance, December 31, 2014			6,834			$	6.79			$	0.5				0.8
Exercisable, December 31, 2014			6,834			$	6.79			$	0.5				0.8

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

Year Ended December 31,		2014				2013				2012
Per share intrinsic value of non-vested stock granted		$	68.99			$	43.13			$	23.82
Weighted average per share discount for compensation expense recognized under the 2009 ESPP			11.92				8.81				4.29
Total intrinsic value of stock options exercised (millions)			3.1				8.7				7.2
Fair value of non-vested stock that vested during the period (millions)			18.9				8.4				3.5
Stock-based compensation recognized in results of operations, as a component of selling, general and administrative expense - excludes compensation expense related to an option granted to one of our executives. (millions)			7.4				6.6				3.1
Tax benefit recognized in Consolidated Statements of Operations (millions)			2.6				2.3				1.0
Cash received from options exercised and shares purchased under all share-based arrangements (millions)			4.9				5.2				8.8
Tax deduction realized related to stock options exercised (millions)			8.4				6.5				4.1

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Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

-Section 50

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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