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Operating Segments and Related Information Operating Segments and related information (Details 3) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Segment Reporting, Revenue Reconciling Item [Line Items]    
Unallocated corporate expense $ (18,223) $ (16,624)
Amortization of purchased Intangible Assets (6,736) (4,207)
Amortization of acquisition-related inventory step-up (1,992) 0
Restructuring Charges (88) (198)
Consolidated earnings from operations 59,086 57,377
Other Nonoperating Expense (3,522) (1,757)
Consolidated earnings before income taxes 55,564 55,620
Total Segments [Member]    
Segment Reporting, Revenue Reconciling Item [Line Items]    
Consolidated segment operating income 86,125 78,406
Consolidated earnings from operations $ 86,125 $ 78,406