Condensed Statements of Consolidated Income (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Statements of Consolidated Income
Net sales	$ 329,522	$ 303,099	$ 660,867	$ 606,296
Cost of products sold	256,016	235,109	505,323	466,484
Gross profit	73,506	67,990	155,544	139,812
Selling, general and administrative expenses	45,489	37,677	89,767	77,606
Operating profit	28,017	30,313	65,777	62,206
Other income (expense):
Interest expense	(1,393)	(1,644)	(2,815)	(2,313)
Interest income	467	219	687	386
Foreign exchange loss	(636)	(4,224)	(161)	(7,400)
Other, net	(324)	(384)	(329)	(393)
Non operating income (expense), total	(1,886)	(6,033)	(2,618)	(9,720)
Income from continuing operations before income tax expense	26,131	24,280	63,159	52,486
Income tax expense	(330)	(18,283)	(6,076)	(22,632)
Income from continuing operations, net of tax	25,801	5,997	57,083	29,854
Loss from discontinued operations, net of tax	(89)	(518)	(329)	(381)
Consolidated net income	25,712	5,479	56,754	29,473
Net (income) loss attributable to the noncontrolling interest	(1,092)	7,310	(1,482)	5,916
Net income attributable to OM Group, Inc.	24,620	12,789	55,272	35,389
Earnings per common share - basic:
Income from continuing operations attributable to OM Group, Inc. common shareholders	$ 0.81	$ 0.44	$ 1.82	$ 1.18
Loss from discontinued operations attributable to OM Group, Inc. common shareholders		$ (0.02)	$ (0.01)	$ (0.02)
Net income attributable to OM Group, Inc. common shareholders	$ 0.81	$ 0.42	$ 1.81	$ 1.16
Earnings per common share - assuming dilution:
Income from continuing operations attributable to OM Group, Inc. common shareholders	$ 0.80	$ 0.43	$ 1.81	$ 1.17
Loss from discontinued operations attributable to OM Group, Inc. common shareholders		$ (0.01)	$ (0.01)	$ (0.01)
Net income attributable to OM Group, Inc. common shareholders	$ 0.80	$ 0.42	$ 1.80	$ 1.16
Weighted average shares outstanding - basic	30,535	30,471	30,531	30,388
Weighted average shares outstanding - assuming dilution	30,721	30,591	30,708	30,522
Amounts attributable to OM Group, Inc. common shareholders:
Income from continuing operations, net of tax	24,709	13,307	55,601	35,770
Loss from discontinued operations, net of tax	(89)	(518)	(329)	(381)
Net income attributable to OM Group, Inc.	$ 24,620	$ 12,789	$ 55,272	$ 35,389