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Segments and Related Information (Reconciliation of Segment Assets from Segment to Consolidated) (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets $ 2,919,638,000 $ 2,416,308,000 $ 2,094,700,000
Current assets of discontinued operations 2,300,000 18,600,000 30,600,000
Long-term assets of discontinued operations 10,100,000 7,600,000 121,700,000
Continuing Operations [Member]
     
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets $ 2,907,200,000 $ 2,390,100,000 $ 1,942,400,000