Operating Segments and Related Information Operating Segments and related information (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Unallocated corporate expense	$ (22,427)	$ (25,492)	$ (79,865)	$ (68,733)
Amortization of purchased Intangible Assets	(5,824)	(7,102)	(17,909)	(20,854)
Amortization of acquisition-related inventory step-up	0	0	0	(1,992)
Loss on sale of business	0	0	10,178	0
Other	(3,562)	(1,630)	(6,823)	(3,730)
Consolidated earnings from operations	88,552	87,086	232,710	212,802
Other Nonoperating Expense	(3,134)	(2,553)	(9,724)	(9,165)
Consolidated earnings before income taxes	85,418	84,533	222,986	203,637
Total Segments [Member]
Business Unit Reporting, Revenue Reconciling Item [Line Items]
Consolidated segment operating income	120,365	121,310	347,485	308,111
Consolidated earnings from operations	$ 120,365	$ 121,310	$ 347,485	$ 308,111