Note 11 - Stock Based Compensation (Detail) - Stock-based Compensation Information (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Weighted average grant-date fair value per share of stock options granted (in Dollars per share)			$ 4.19
Per share intrinsic value of non-vested stock granted (in Dollars per share)	$ 23.82	$ 13.58	$ 6.02
Total intrinsic value of stock options exercised (in millions)	$ 7.2	$ 1.5	$ 1.1
Fair value of non-vested stock that vested during the period (in millions)	3.5	0.7	0.4
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. See Note 18. (in millions)	3.1	2.3	1.8
Tax benefit recognized in Consolidated Statements of Operations (in millions)	1.0	0.7	0.5
Cash received from options exercised and shares purchased under all share-based arrangements (in millions)	8.8	5.8	4.2
Tax deduction realized related to stock options exercised (in millions)	$ 4.1	$ 0.9	$ 0.5
Per Share Discount [Member]
Weighted average per share discount for compensation expense recognized under the 2009 ESPP (in Dollars per share)	$ 4.29	$ 2.56	$ 1.11