Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill and Other Intangible Assets [Abstract]

Details and activity of goodwill by segment

	Electronic Materials			Performance Coatings			Color and Glass Performance Materials			Polymer Additives			Specialty Plastics			Pharmaceuticals			Total
	(Dollars in thousands)
Balance at December 31, 2009:
Gross goodwill	$	151,975		$	41,984		$	68,473		$	73,447		$	16,973		$	40,431		$	393,283
Accumulated impairment losses		—			(41,388	)		—			(73,447	)		(16,973	)		(40,431	)		(172,239	)
		151,975			596			68,473			—			—			—			221,044
Acquisitions		—			4,038			—			—			—			—			4,038
Dispositions		—			—			(4,237	)		—			—			—			(4,237	)
Other adjustments		(17	)		—			(202	)		—			—			—			(219	)
Foreign currency adjustment		637			(22	)		(1,525	)		—			—			—			(910	)
Balance at December 31, 2010:
Gross goodwill		152,595			46,000			62,509			73,447			16,973			40,431			391,955
Accumulated impairment losses		—			(41,388	)		—			(73,447	)		(16,973	)		(40,431	)		(172,239	)
		152,595			4,612			62,509			—			—			—			219,716
Impairments		—			(3,881	)		—			—			—			—			(3,881	)
Other adjustments		(2	)		—			(46	)		—			—			—			(48	)
Foreign currency adjustment		357			(159	)		(384	)		—			—			—			(186	)
Balance at December 31, 2011:
Gross goodwill		152,950			45,841			62,079			73,447			16,973			40,431			391,721
Accumulated impairment losses		—			(45,269	)		—			(73,447	)		(16,973	)		(40,431	)		(176,120	)
	$	152,950		$	572		$	62,079		$	—		$	—		$	—		$	215,601

Significant assumptions used in impairment analysis of goodwill

Significant Assumptions	2011	2010
Weighted-average cost of capital	13.0% - 14.0%	12.0% - 13.0%
Residual growth rate	3%	3.0% - 5.0%

Details of amortizable intangible assets

	Estimated Economic Life		December 31,
			2011			2010
			(Dollars in thousands)
Gross amortizable intangible assets:
Patents		5 - 16 years	$	5,653		$	5,714
Land rights		14 - 40 years		5,036			4,885
Technological know-how and other		5 - 30 years		11,514			11,475
Total gross amortizable intangible assets				22,203			22,074
Accumulated amortization:
Patents				(4,607	)		(4,447	)
Land rights				(2,272	)		(2,125	)
Technological know-how and other				(4,268	)		(3,633	)
Total accumulated amortization				(11,147	)		(10,205	)
Amortizable intangible assets, net			$	11,056		$	11,869