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Reportable Segments and Geographic Information (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets from reportable segments to total assets
Total assets	$ 4,254,847	$ 4,360,662
Assets from reportable segments
Assets from reportable segments to total assets
Total assets	3,332,258	3,345,827
Other assets
Assets from reportable segments to total assets
Total assets	900,843	896,951
Assets associated with discontinued operations
Assets from reportable segments to total assets
Total assets	$ 21,746	$ 117,884

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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