Segment Information (Schedule Long-Lived Assets By Geographic Area) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Segment Reporting [Abstract]
Long-lived assets in United States	$ 466,115		$ 429,678
Long-lived assets in International locations	45,331		46,477
Total long lived assets	$ 511,446		$ 476,155
Number of countries accounted for ten percent or more of total assets	0	0

Amount of long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets, located in the entity's country of domicile.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 280

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-Section 50

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Number 131

-Paragraph 38

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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