Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Current Assets:
Accounts Receivable Allowances	$ 4,805	$ 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)	18,922,900	19,038,843
Common Stock, outstanding (in shares)	18,922,900	19,038,843