Segment Information (Schedule Of Consolidated Financial Statements By Industry Segments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended														12 Months Ended
	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Segment Reporting Information [Line Items]
Net sales	$ 629,788		$ 645,981		$ 657,686		$ 645,613		$ 619,804		$ 647,088		$ 633,189	$ 600,288	$ 2,579,068		$ 2,500,369		$ 2,179,319
Operating profit from continuing operations	76,183		86,584	[1]	69,377	[2]	78,297	[3]	(194,005)		80,290	[4]	78,851	71,435	310,441		36,571		233,300
Interest income															1,879		1,635		1,184
Interest expense															(26,831)		(26,255)		(26,841)
Miscellaneous income															(884)		2,810		1,424
Income before income taxes															284,605		14,761		209,067
Assets	2,889,878								2,843,531						2,889,878		2,843,531		2,706,697
Goodwill	813,792								820,824						813,792		820,824		810,285
Capital expenditures															29,308		34,737		21,033
Depreciation and amortization															57,263		62,943		59,841
Restructuring charge			3,556		160		14,747								18,463		0		6,676
Reporting segments [Member]
Segment Reporting Information [Line Items]
Operating profit from continuing operations															375,288		366,746		282,671
Assets	2,149,127								2,141,874						2,149,127		2,141,874		2,070,086
Capital expenditures															28,662		34,302		20,443
Depreciation and amortization															55,541		61,151		57,965
Corporate - before asbestos and environmental charges [Member]
Segment Reporting Information [Line Items]
Operating profit from continuing operations															(64,847)		(58,201)		(49,371)
Restructuring charge															25
Acquisition costs associated with the potential acquisition of MEI			3,874
Corporate expense - asbestos charge [Member]
Segment Reporting Information [Line Items]
Operating profit from continuing operations															0		241,647		0
Corporate expense - environmental charges [Member]
Segment Reporting Information [Line Items]
Operating profit from continuing operations															0		30,327		0
Corporate [Member]
Segment Reporting Information [Line Items]
Assets	740,751	[5]							701,657	[5]					740,751	[5]	701,657	[5]	636,611	[5]
Capital expenditures															646		435		590
Depreciation and amortization															$ 1,722		$ 1,792		$ 1,876

[1] Includes the impact of item (i), $3,556 of restructuring charges, $460 pension curtailment charge, and $3,874 non-deductible acquisition costs associated with the pending acquisition of MEI.

[2] Includes the impact of item (e) and $160 of restructuring charges.

[3] Includes $14,747 of restructuring charges.

[4] Includes a $241,647 asbestos provision and a $30,327 environmental provision.

[5] Net sales and assets by geographic region are based on the location of the business unit.