CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net sales
Product sales	$ 427,732	$ 457,026	$ 1,313,290	$ 1,351,126
Service sales	97,803	101,357	303,638	319,414
Total net sales	525,535	558,383	1,616,928	1,670,540
Cost of sales
Cost of product sales	284,007	301,592	864,701	890,051
Cost of service sales	56,034	63,460	193,286	204,313
Total cost of sales	340,041	365,052	1,057,987	1,094,364
Gross profit	185,494	193,331	558,941	576,176
Research and development expenses	(15,050)	(16,909)	(45,633)	(51,150)
Selling expenses	(30,247)	(30,610)	(90,440)	(95,340)
General and administrative expenses	(76,384)	(71,563)	(220,778)	(222,244)
Operating income	63,813	74,249	202,090	207,442
Interest expense	(8,972)	(9,013)	(26,953)	(27,054)
Other income, net	161	(159)	605	(70)
Earnings from continuing operations before income taxes	55,002	65,077	175,742	180,318
Provision for income taxes	(16,860)	(20,699)	(54,256)	(56,501)
Earnings from continuing operations	38,142	44,378	121,486	123,817
Discontinued operations, net of taxes
Loss from discontinued operations, net of taxes	(4,258)	(19,345)	(45,874)	(27,229)
Net earnings	$ 33,884	$ 25,033	$ 75,612	$ 96,588
Basic earnings per share
Earnings from continuing operations (usd per share)	$ 0.82	$ 0.92	$ 2.58	$ 2.58
Earnings from discontinued operations (usd per share)	(0.09)	(0.40)	(0.97)	(0.57)
Total, Basic earnings per share (usd per share)	0.73	0.52	1.61	2.01
Diluted earnings per share
Earnings from continuing operations (usd per share)	0.80	0.90	2.53	2.52
Earnings from discontinued operations (usd per share)	(0.09)	(0.39)	(0.96)	(0.55)
Total, Diluted earnings per share (usd per share)	0.71	0.51	1.57	1.97
Dividends per share	$ 0.13	$ 0.13	$ 0.39	$ 0.39
Weighted average shares outstanding:
Basic (shares)	46,366	48,067	47,082	48,054
Diluted (shares)	47,395	49,101	48,106	49,136