Note 1 - Nature of Operations and Basis of Presentation (Details) In Millions, unless otherwise specified	12 Months Ended					60 Months Ended	66 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Jun. 30, 2013	Jun. 30, 2013
Disclosure Text Block [Abstract]
Number of Businesses Acquired	3	9	14	11	3	40	40
Number Of Service Centers						57	57
Number of States in which Entity Operates						50	50
Stock Issued During Period, Shares, New Issues (in Shares)			9.3