Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accounts receivable, allowances for doubtful accounts	$ 6,189	$ 5,893
Common Stock, par value	$ 0.25	$ 0.25
Common Stock, shares authorized	360,000,000	360,000,000
Common Stock, shares issued	110,834,088	110,834,088
Treasury stock, shares	12,769,655	12,984,829