Long-Term Debt (Narrative) (Details)	Dec. 31, 2012 USD ($)	Dec. 31, 2012 Bank revolving credit facility France EUR (€)	Dec. 31, 2012 Bank revolving credit facility Canada CAD	Dec. 31, 2012 Bank revolving credit facility Australia AUD	Dec. 31, 2012 Bank revolving credit facility Amended and Restated Revolving Credit Agreement USD ($)	Dec. 31, 2012 Bank revolving credit facility Amended and Restated Revolving Credit Agreement Standby Letters of Credit USD ($)	Dec. 31, 2012 Bank revolving credit facility Lloyd's TSB Bank PLC Annual Overdraft Facility
Debt Instrument [Line Items]
Aggregate commitments					$ 100,000,000
Maximum amount of aggregate commitements (up to $50,000,000)					50,000,000
Amount of capacity						1,335,000
Available borrowings					98,665,000
Interest rate percentage							2.00%
Amount of available borrowings		6,200,000	3,500,000	400,000
Bank revolving credit facility		238,000
2013	588,000
2014	109,000
2015	9,000
Thereafter	$ 0