Consolidated Condensed Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Apr. 02, 2011
Consolidated Condensed Balance Sheets [Abstract]
Reserves, accounts receivable	$ 97,461	$ 94,739	$ 87,648
Deferred income taxes, of prepaid expenses and other current assets	59,436	58,602	62,362
Deferred income taxes, of other assets noncurrent	24,136	21,885	14,792
Deferred income taxes, Accrued income taxes payable	1,253	1,476	1,105
Deferred income taxes, other long term liabilities	$ 38,712	$ 37,000	$ 79,694
Common stock, par value	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	112,500,000	112,500,000	112,500,000
Common stock, shares issued	52,923,949	52,184,730	52,038,223
Treasury stock, shares	11,887,658	11,790,428	8,041,540