Condensed Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Continuing Operations
Net sales	$ 248,044	$ 228,822	$ 708,708	$ 621,650
Cost of sales	177,054	170,546	517,891	458,163
Gross profit	70,990	58,276	190,817	163,487
General, selling and administrative expenses	43,937	35,604	123,354	105,769
Operating profit	27,053	22,672	67,463	57,718
Other income (expense):
Interest expense, net	(2,824)	(2,542)	(8,308)	(7,092)
Other, net	(144)	2,191	83	2,146
Total other income (expense), net	(2,968)	(351)	(8,225)	(4,946)
Income before income taxes and income (loss) from affiliates and joint ventures	24,085	22,321	59,238	52,772
Income tax expense	6,675	5,219	16,935	12,877
Income before income (loss) from affiliates and joint ventures	17,410	17,102	42,303	39,895
Income (loss) from affiliates and joint ventures	3,080	337	4,076	266
Income (loss) from continuing operations	20,490	17,439	46,379	40,161
Discontinued Operations
Income (loss) on discontinued operations	(1,021)	(132)	(916)	(789)
Net income (loss)	19,469	17,307	45,463	39,372
Net income (loss) attributable to noncontrolling interests	44	(110)	48	(322)
Net income (loss) attributable to AMCOL shareholders	19,425	17,417	45,415	39,694
Weighted average common shares outstanding	31,800	31,225	31,672	31,137
Weighted average common and common equivalent shares outstanding	32,193	31,565	32,128	31,498
Basic earnings (loss) per share:
Continuing operations	$ 0.64	$ 0.56	$ 1.46	$ 1.30
Discontinued operations	$ (0.03)		$ (0.03)	$ (0.03)
Net income	$ 0.61	$ 0.56	$ 1.43	$ 1.27
Diluted earnings (loss) per share:
Continuing operations	$ 0.63	$ 0.55	$ 1.44	$ 1.29
Discontinued operations	$ (0.03)		$ (0.03)	$ (0.03)
Net income	$ 0.60	$ 0.55	$ 1.41	$ 1.26
Amounts attributable to Amcol International Corporation shareholders
Income from continuing operations, net of tax	20,446	17,549	46,331	40,483
Discontinued operations, net of tax	(1,021)	(132)	(916)	(789)
Net income	$ 19,425	$ 17,417	$ 45,415	$ 39,694
Dividends declared per share	$ 0.18	$ 0.18	$ 0.54	$ 0.54