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Business Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Segment Reporting Information [Line Items]
Net sales	$ 711,066	$ 645,309
Gross Profit	391,193	350,096
Unallocated corporate general and administrative expenses	16,575	13,220
Industrial Technology
Segment Reporting Information [Line Items]
Net sales	195,136	169,982
Percent change in Net Sales	14.8
Gross Profit	98,663	85,714
Percent change in Gross Profit	15.1
Operating Profit	57,507	46,189
Percent change in Operating Profit	24.5
Long-lived assets	42,698	41,361
Percent change in Long-lived assets	3.2
Energy Systems And Controls
Segment Reporting Information [Line Items]
Net sales	148,602	129,633
Percent change in Net Sales	14.6
Gross Profit	80,408	70,146
Percent change in Gross Profit	14.6
Operating Profit	35,657	29,044
Percent change in Operating Profit	22.8
Long-lived assets	19,439	18,256
Percent change in Long-lived assets	6.5
Medical And Scientific Imaging
Segment Reporting Information [Line Items]
Net sales	162,811	145,287
Percent change in Net Sales	12.1
Gross Profit	106,186	91,254
Percent change in Gross Profit	16.4
Operating Profit	43,362	35,037
Percent change in Operating Profit	23.8
Long-lived assets	45,602	43,084
Percent change in Long-lived assets	5.8
RF Technology
Segment Reporting Information [Line Items]
Net sales	204,517	200,407
Percent change in Net Sales	2.1
Gross Profit	105,936	102,982
Percent change in Gross Profit	2.9
Operating Profit	50,353	44,950
Percent change in Operating Profit	12.0
Long-lived assets	$ 29,832	$ 31,331
Percent change in Long-lived assets	(4.8)

X

- Definition

The percent change in aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity, from the previous period to the current period.

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- Definition

The percent change in total revenue from sales of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances and sales discounts, from the previous period to the current period.

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- Definition

The percent change in the total amount of profit or loss for reportable segments, from the previous period to the current period.

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- Definition

The percent change in total assets for reportable segments, from the previous period to the current period.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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- Definition

Amount of an item in the reconciliation of total profit or loss from reportable segments, to the entity's consolidated income before income taxes, extraordinary items, discontinued operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 131

-Paragraph 32

-Subparagraph b

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- Definition

Total assets for reportable segments.

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-Name Statement of Financial Accounting Standard (FAS)

-Number 131

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The total amount of profit or loss for reportable segments.

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