XML 58 R83.htm IDEA: XBRL DOCUMENT

Noncontrolling Interest (Details Textual) (USD $) In Thousands, unless otherwise specified	12 Months Ended			1 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jan. 31, 2011 Volclay South Africa (Proprietary) Limited [Member]	Feb. 28, 2011 Vengawave (Proprietary) Limited [Member]
Noncontrolling Interest (Textual) [Abstract]
Remaining noncontrolling interest acquired	$ 5,735	$ (2,701)	$ 5,528	$ 5,600
Percentage of interest sold					26.00%

Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests).

+ References+ Details