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14. Segment Information Segment Asset Reconciliation (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Segment Reporting, Asset Reconciling Item [Line Items]    
Total assets $ 3,711,542 $ 3,341,278
Other Noncurrent Assets [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Total assets 969,400 674,900
Goodwill [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Total assets 495,900 500,400
Property, Plant and Equipment excluding segment specific [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Total assets 46,100 26,700
Other Current Assets [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Total assets 926,900 888,100
Operating Segments [Member]    
Segment Reporting, Asset Reconciling Item [Line Items]    
Total assets $ 1,273,200 $ 1,251,200