CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS (UNAUDITED) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Statement [Abstract]
Net sales	$ 617,687	$ 526,386	$ 1,210,374	$ 1,028,047
Cost of sales	416,673	362,379	825,653	704,766
Gross profit	201,014	164,007	384,721	323,281
Research and development expenses	15,903	15,351	33,511	30,698
Selling expenses	38,900	32,888	75,696	65,369
General and administrative expenses	88,423	75,228	179,700	151,115
Operating income	57,788	40,540	95,814	76,099
Interest expense	(9,332)	(6,526)	(17,991)	(13,008)
Other income, net	224	130	698	232
Earnings from continuing operations before income taxes	48,680	34,144	78,521	63,323
Provision for income taxes	15,310	11,309	24,208	20,646
Earnings from continuing operations	33,370	22,835	54,313	42,677
Discontinued operations, net of taxes
Earnings from discontinued operations	0	0	0	3,059
Gain (loss) on divestiture	0	(95)	0	18,316
Earnings (loss) from discontinued operations	0	(95)	0	21,375
Net of tax	$ 33,370	$ 22,740	$ 54,313	$ 64,052
Basic earnings per share
Earnings from continuing operations (usd per share)	$ 0.71	$ 0.49	$ 1.16	$ 0.91
Earnings from discontinued operations (usd per share)	$ 0	$ 0.00	$ 0.00	$ 0.46
Total, Basic earnings per share (usd per share)	$ 0.71	$ 0.49	$ 1.16	$ 1.37
Diluted earnings per share
Earnings from continuing operations (usd per share)	$ 0.70	$ 0.48	$ 1.14	$ 0.90
Earnings from discontinued operations (usd per share)	$ 0.00	$ 0.00	$ 0.00	$ 0.45
Total, Diluted earnings per share (usd per share)	$ 0.70	$ 0.48	$ 1.14	$ 1.35
Dividends per share	$ 0.10	$ 0.09	$ 0.19	$ 0.17
Weighted average shares outstanding:
Basic (shares)	46,786	46,820	46,700	46,737
Diluted (shares)	47,507	47,501	47,478	47,519