Segment Information Total Assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Segment Reporting Information [Line Items]
Total Assets	$ 2,031,474		$ 1,774,476
Percentage of assets, minimum for disclosure	10.00%
North America [Member]
Segment Reporting Information [Line Items]
Total Assets	1,177,314	[1],[2]	989,170	[1],[2]
International [Member]
Segment Reporting Information [Line Items]
Total Assets	854,160	[2]	785,306	[2]
United States [Member]
Segment Reporting Information [Line Items]
Total Assets	$ 1,112,600		$ 981,000

[1] North America contains assets from the United States of $1,112.6 million and $981.0 million at December 31, 2012 and 2011, respectively. There were no other individual countries located outside of the United States that represented more than 10% of consolidated total assets at December 31, 2012 or December 31, 2011.

[2] The December 31, 2011 total asset amounts have been reclassified in the disclosure above to conform to the current presentation, which excludes intercompany balances.