Significant Accounting Policies (Tables)

6 Months Ended

Mar. 31, 2012

Significant Accounting Policies [Abstract]

Segment Reporting Revenue Percentage

	Three months ended March 31						Six months ended March 31
	2012			2011			2012			2011
Core Segment		65	%		63	%		65	%		64	%
Performance Segment		28	%		31	%		28	%		30	%
New Business Segment		4	%		4	%		4	%		4	%
Specialty Fluids Segment		3	%		2	%		3	%		2	%