Summarized Financial Information of Equity Method Investee (Details) (USD $)	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2011
Information about income
Headwaters' net income attributable to Blue Flint	$ (6,069,000)	$ 615,000
Blue Flint
Information about assets and liabilities
Total current assets	45,908,000		32,352,000
Total noncurrent assets	69,790,000		72,142,000
Total current liabilities	18,113,000		9,099,000
Total noncurrent liabilities	49,971,000		48,499,000
Information about income
Revenues	50,386,000	35,483,000
Gross profit	3,891,000	2,653,000
Net income	370,000	1,214,000
Headwaters' net income attributable to Blue Flint	189,000	620,000
Proceeds from sale of interest in equity method investee	18,500,000
Equity earnings in Blue Flint since investment	15,000,000
Loss related to sale of interest in equity method investee	$ 6,300,000