Debt (Summary Of Debt Instruments) (Details)	1 Months Ended	12 Months Ended				12 Months Ended		12 Months Ended								1 Months Ended						12 Months Ended
	Nov. 30, 2007	Dec. 31, 2011 USD ($)		Dec. 31, 2010 USD ($)		Dec. 31, 2011 Term Note Payable-Domestic, June 22, 2011 [Member] USD ($)	Jun. 22, 2011 Term Note Payable-Domestic, June 22, 2011 [Member] USD ($)	Dec. 31, 2011 Term Note Payable-Domestic, June 2, 2005 [Member] USD ($)	Dec. 31, 2010 Term Note Payable-Domestic, June 2, 2005 [Member] USD ($)		Jun. 02, 2005 Term Note Payable-Domestic, June 2, 2005 [Member] USD ($)	Dec. 31, 2011 Term Note Payable-Foreign [Member] USD ($)	Dec. 31, 2010 Term Note Payable-Foreign [Member] USD ($)		Apr. 30, 2007 Amended And Restated [Member] USD ($)	Apr. 30, 2008 Delayed Draw Term Loan Facility [Member] USD ($)	Apr. 30, 2007 Delayed Draw Term Loan Facility [Member] USD ($)	Dec. 31, 2011 Facility A Term Loan [Member] USD ($)	Dec. 31, 2011 Facility B Term Loan [Member] USD ($)	Dec. 31, 2011 US Tranche [Member] USD ($)	Dec. 31, 2011 Global Tranche [Member] USD ($)	Dec. 31, 2011 Commercial Paper [Member]	Jun. 22, 2011 Line Of Credit [Member] Term Note Payable-Domestic, June 22, 2011 [Member] USD ($)	Jun. 22, 2011 Swing Line Loans [Member] Term Note Payable-Domestic, June 22, 2011 [Member] USD ($)	Dec. 31, 2011 Base Rate [Member]	Dec. 31, 2011 Eurodollar Rate [Member]	Dec. 31, 2011 CZK [Member] Facility A Term Loan [Member] CZK	Dec. 31, 2011 CZK [Member] Facility B Term Loan [Member] CZK	Dec. 31, 2011 Maximum [Member] Base Rate [Member] Term Note Payable-Domestic, June 22, 2011 [Member]	Dec. 31, 2011 Maximum [Member] Base Rate [Member] Term Note Payable-Domestic, June 2, 2005 [Member]	Dec. 31, 2011 Maximum [Member] Eurodollar Rate [Member] Term Note Payable-Domestic, June 22, 2011 [Member]	Dec. 31, 2011 Maximum [Member] Eurodollar Rate [Member] Term Note Payable-Domestic, June 2, 2005 [Member]	Dec. 31, 2011 Maximum [Member] PRIBOR [Member] Facility A Term Loan [Member]	Dec. 31, 2011 Maximum [Member] PRIBOR [Member] Facility B Term Loan [Member]	Dec. 31, 2011 Minimum [Member] Base Rate [Member] Term Note Payable-Domestic, June 22, 2011 [Member]	Dec. 31, 2011 Minimum [Member] Base Rate [Member] Term Note Payable-Domestic, June 2, 2005 [Member]	Dec. 31, 2011 Minimum [Member] Eurodollar Rate [Member] Term Note Payable-Domestic, June 22, 2011 [Member]	Dec. 31, 2011 Minimum [Member] Eurodollar Rate [Member] Term Note Payable-Domestic, June 2, 2005 [Member]	Dec. 31, 2011 Minimum [Member] PRIBOR [Member] Facility A Term Loan [Member]	Dec. 31, 2011 Minimum [Member] PRIBOR [Member] Facility B Term Loan [Member]
Debt Instrument [Line Items]
Term note payable		$ 292,500,000	[1]				$ 300,000,000		$ 270,350,000	[2]	$ 130,000,000		$ 52,830,000	[3]	$ 250,000,000		$ 50,000,000	$ 49,800,000	$ 34,500,000								990,000,000	685,000,000
Revolving line of credit		125,000,000	[1]				600,000,000				30,000,000				50,000,000					30,000,000	20,000,000		20,000,000	20,000,000
Other obligations		1,283,000		2,233,000
Total notes payable and other obligations		418,783,000		325,413,000
Securitization facility		280,000,000	[4]	144,000,000	[4]
Current portion		420,354,000		155,617,000
Long-term portion		278,429,000		313,796,000
Total notes payable, credit agreements and securitization facility		698,783,000		469,413,000
Borrowings outstanding on the term loan and revolving line of credit						293,000,000
Borrowings outstanding on the revolving line of credit		125,000,000
Interest on the line of credit, sum of rate plus																													1.25%	1.50%	2.25%	2.50%			0.25%	1.00%	1.25%	2.00%
Principal payment due	Nov. 01, 2010					Jun. 01, 2016
Principal payments on term loan						7,500,000		270,400,000	5,900,000			59,700,000	6,500,000
Additional borrowings from term loan																50,000,000
Interest on the term loan, sum of rate plus																									1.25%	2.25%							0.95%	2.00%					1.75%	2.90%
Interest on initial aggregate principal amount of the loans								0.25%
Current purchase limit under the securitization facility		$ 500,000,000
Securitization facility expiration date		February 4, 2013
Program fee rate																						0.34%
Program fee variable rate																						0.90%
Unused facility fee payable rate		0.50%

[1] The Company entered into a $300 million term loan and a $600 million revolving line of credit on June 22, 2011. The revolving line of credit contains a $20 million sublimit for letters of credit, a $20 million sublimit for swing line loans and a sublimit for multicurrency borrowings in Euros, Sterling and Japanese Yen. Proceeds from this new credit facility were used to retire the Company's indebtedness under its 2005 Credit Facility and CCS Credit Facility, as described below. At December 31, 2011, the Company had $293 million borrowings outstanding on the term loan and $125 million outstanding on the revolving line of credit, respectively. Interest on the line of credit ranges from the sum of the Base Rate plus 0.25% to 1.25% or the Eurodollar Rate plus 1.25% to 2.25%. The term loan is payable in quarterly installments and is due on the last business day of each March, June, September, and December with the final principal payment due in June 2016. Borrowings on the revolving credit facility are repayable at our option of one, two, three or six months after borrowing, depending on the term of the borrowing on the facility. This facility is referred to as the Credit Facility. Principal payments of $7.5 million were made on the term loan during 2011.

[2] The Company entered into a $130 million term loan and a $30 million revolving line of credit on June 2, 2005. On April 30, 2007, the Company amended and restated the facility increasing the term loan to $250 million, increasing the revolving line of credit facility to $50 million and entering into a $50 million delayed draw term loan facility. This facility is referred to as the 2005 Credit Facility. In April 2008, the Company borrowed the additional $50 million from the delayed draw term loan facility. The revolving line of credit facility was comprised of a $30 million US tranche and a $20 million global tranche and was collateralized by the assets and operations of the respective country where the borrowings are incurred. Interest on the term loan was payable at a rate per annum equal to the sum of the Base Rate plus 1.25% or the Eurodollar Rate plus 2.25%. Interest on the line of credit ranged from the sum of the Base Rate plus 1.00% to 1.50% or the Eurodollar Rate plus 2.00% to 2.50%. The term loan was payable in quarterly installments of 0.25% of the initial aggregate principal amount of the loans and was due on the last business day of each March, June, September, and December with the final principal payment due in April 2013. On June 22, 2011, proceeds from the Company's new Credit Facility were used to retire the Company's existing indebtedness under the 2005 Credit Facility. Principal payments of $270.4 million and $5.9 million were made on the term loan during 2011 and 2010, respectively, which includes the final payment to retire the indebtedness.

[3] On December 7, 2006, one of the Company's foreign subsidiaries entered into foreign term loans in the Czech Republic denominated in Czech Koruna. The Facility A term loan was for CZK 990 million ($49.8 million) and the Facility B term loan was for CZK 685 million ($34.5 million). This facility is referred to as the CCS Credit Facility. Interest on the Facility A term loan was payable at a rate per annum equal to the sum of PRIBOR (Prague Interbank Offered Rate) plus 0.95% to 1.75%. Interest on the Facility B term loan was payable at a rate per annum equal to the sum of PRIBOR plus 2.0% to 2.9%. The Facility A term loan was payable in semiannual payments in June and December of each year beginning in June 2007 and ending in December 2013. The Facility B term loan was payable in a lump sum in December 2014. On June 22, 2011, proceeds from the Company's new Credit Facility were used to retire the Company's existing indebtedness under the CCS Credit Facility. Principal payments of $59.7 million and $6.5 million were made on the term loan during 2011 and 2010, respectively, which includes the final payment to retire the indebtedness.

[4] The Company is party to a receivables purchase agreement (Securitization Facility) that was amended and restated for the fourth time as of October 29, 2007 and which has been amended seven times since then to add or remove purchasers, extend the facility termination date and remove all financial covenants. The current purchase limit under the securitization facility is $500 million. The facility was amended for the seventh time on February 6, 2012 to add a new purchaser and extend the facility termination date to February 4, 2013. There is a program fee equal to the Commercial Paper Rate of 0.34%, plus 0.90% as of December 31, 2011. The unused facility fee is payable at a rate of 0.50% per annum as of December 31, 2011. The Securitization Facility provides for certain termination events, which includes nonpayment, upon the occurrence of which the administrator may declare the facility termination date to have occurred, may exercise certain enforcement rights with respect to the receivables, and may appoint a successor servicer, among other things.