Consolidated Condensed Balance Sheets (Unaudited) (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Trade accounts receivable, allowance for doubtful accounts (in Dollars)	$ 2,066	$ 2,772
Total assets of variable interest entities(VIE) (in Dollars)	37,100	41,100
Total liabilities of VIEs (in Dollars)	$ 8,000	$ 10,600
Preferred stock, shares authorized	50,000,000	50,000,000
Preferred stock, shares outstanding	0	0
Preferred stock, par value (in Dollars per share)	$ 0	$ 0
Voting Common Stock [Member]
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares issued	88,347,201	87,695,495
Common stock, par value (in Dollars per share)	$ 0	$ 0
Nonvoting Common Stock [Member]
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares issued	410,242	828,885
Common stock, par value (in Dollars per share)	$ 0	$ 0