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