Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Customer allowances	$ 6,082	$ 6,934
Allowance for note receivable	$ 14,955	$ 16,648
Shareholders' equity:
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	26,727,780	26,727,780
Treasury stock, shares	5,077,135	5,162,354