Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Receivables:
Trade, Allowances for Doubtful Accounts and Returns	$ 4,828	$ 4,311
Shareholders' Equity
Preferred Stock, par value (in dollars per share)	$ 0.02	$ 0.02
Preferred Stock, authorized (in shares)	1,000,000	1,000,000
Preferred Stock, issued (in shares)	0	0
Preferred Stock, outstanding (in shares)	0	0
Common Stock, par value (in dollars per share)	$ 0.375	$ 0.375
Common Stock, authorized (in shares)	60,000,000	60,000,000
Common Stock, issued (in shares)	18,834,940	18,834,940
Common Stock, outstanding (in shares)	19,038,843	19,038,843