Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Accounts receivable, allowances for doubtful accounts	$ 563	$ 594
Common Stock, par value	$ 0.25	$ 0.25
Common Stock, shares authorized	180,000,000	180,000,000
Common Stock, shares issued	110,834,088	110,834,088
Treasury stock, shares	2,930,514	2,799,118