Consolidated Balance Sheets (Parentheticals) - $ / shares shares in Thousands	Dec. 31, 2015	Dec. 31, 2014
Common Stock, Number of Shares, Par Value and Other Disclosures
Common stock, par value
Common stock, shares authorized	75,000	75,000
Common stock, shares issued	37,906	38,591
Common stock, shares outstanding	37,906	38,591
Preferred Stock, Number of Shares, Par Value and Other Disclosures
Preferred stock, par value
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0