CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net sales
Product sales	$ 439,871	$ 457,873	$ 885,558	$ 894,100
Service sales	105,323	111,325	205,835	218,057
Total net sales	545,194	569,198	1,091,393	1,112,157
Cost of sales
Cost of product sales	287,685	299,525	580,694	588,459
Cost of service sales	75,158	71,442	137,252	140,853
Total cost of sales	362,843	370,967	717,946	729,312
Gross profit	182,351	198,231	373,447	382,845
Research and development expenses	(15,321)	(17,364)	(30,583)	(34,241)
Selling expenses	(29,105)	(32,099)	(60,193)	(64,730)
General and administrative expenses	(72,483)	(76,609)	(144,394)	(150,681)
Operating income	65,442	72,159	138,277	133,193
Interest expense	(8,985)	(8,986)	(17,981)	(18,041)
Other income, net	(37)	(23)	444	89
Earnings from continuing operations before income taxes	56,420	63,150	120,740	115,241
Provision for income taxes	(16,299)	(20,141)	(37,396)	(35,802)
Earnings from continuing operations	40,121	43,009	83,344	79,439
Discontinued operations, net of taxes
Loss from discontinued operations, net of taxes	(14,384)	(6,618)	(41,616)	(7,884)
Net earnings	$ 25,737	$ 36,391	$ 41,728	$ 71,555
Basic earnings per share
Earnings from continuing operations (usd per share)	$ 0.85	$ 0.90	$ 1.76	$ 1.65
Earnings from discontinued operations (usd per share)	(0.31)	(0.14)	(0.88)	(0.16)
Total, Basic earnings per share (usd per share)	0.54	0.76	0.88	1.49
Diluted earnings per share
Earnings from continuing operations (usd per share)	0.83	0.87	1.72	1.62
Earnings from discontinued operations (usd per share)	(0.30)	(0.13)	(0.86)	(0.16)
Total, Diluted earnings per share (usd per share)	0.53	0.74	0.86	1.46
Dividends per share	$ 0.13	$ 0.13	$ 0.26	$ 0.26
Weighted average shares outstanding:
Basic (shares)	47,224	48,175	47,466	48,055
Diluted (shares)	48,258	49,239	48,487	49,160