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Reportable Segments and Geographic Information (Details 2) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
--- | --- | --- | ---
Assets from reportable segments to total assets |  |  |
Assets associated with discontinued operations | $ 18,006 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation | $ 21,360 us-gaap_AssetsOfDisposalGroupIncludingDiscontinuedOperation |
Total assets | 4,857,147 us-gaap_Assets | 4,227,157 us-gaap_Assets |
Continuing Operations |  |  |
Assets from reportable segments to total assets |  |  |
Total assets | 4,839,141 us-gaap_Assets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 4,205,797 us-gaap_Assets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 4,204,500 us-gaap_Assets / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Reportable Segments | Continuing Operations |  |  |
Assets from reportable segments to total assets |  |  |
Total assets | 3,790,875 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 3,285,986 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | 3,327,566 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_OperatingSegmentsMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember
Other | Continuing Operations |  |  |
Assets from reportable segments to total assets |  |  |
Total assets | $ 1,048,266 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ 919,811 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember | $ 876,934 us-gaap_Assets / us-gaap_ConsolidationItemsAxis = us-gaap_CorporateNonSegmentMember / us-gaap_StatementOperatingActivitiesSegmentAxis = us-gaap_SegmentContinuingOperationsMember

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