Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Condensed Consolidated Statements of Operations [Abstract]
Revenues	$ 57,623	$ 41,812	$ 136,026	$ 93,026
Cost of Revenues	36,736	32,580	89,291	73,422
Gross Profit	20,887	9,232	46,735	19,604
Operating Expenses	9,904	8,094	28,212	26,871
Environmental Remediation Charges		6,000		6,000
Other Operating Gains			14	2,929
Operating Income (Loss)	10,983	(4,862)	18,537	(10,338)
Interest Income and Other (Expense), Net	10	8	24	228
Interest Expense	2,594	2,640	7,824	7,921
Income (Loss) from Continuing Operations before Income Tax	8,399	(7,494)	10,737	(18,031)
Income Tax Expense (Benefit)	3,517	(779)	4,583	(5,307)
Income (Loss) from Continuing Operations	4,882	(6,715)	6,154	(12,724)
Income (Loss) from Discontinued Operations, Net of Tax	(177)	551	(243)	1,728
Net Income (Loss)	$ 4,705	$ (6,164)	$ 5,911	$ (10,996)
Basic Earnings (Loss) Per Share:
Income (Loss) from Continuing Operations	$ 0.65	$ (0.89)	$ 0.82	$ (1.69)
Income (Loss) from Discontinued Operations, Net of Tax	$ (0.02)	$ 0.07	$ (0.03)	$ 0.23
Net Income (Loss)	$ 0.62	$ (0.82)	$ 0.78	$ (1.46)
Diluted Earnings (Loss) Per Share:
Income (Loss) from Continuing Operations	$ 0.64	$ (0.89)	$ 0.81	$ (1.69)
Income (Loss) from Discontinued Operations, Net of Tax	$ (0.02)	$ 0.07	$ (0.03)	$ 0.23
Net Income (Loss)	$ 0.61	$ (0.82)	$ 0.77	$ (1.46)
Weighted-Average Shares Outstanding:
Basic	7,556,000	7,525,000	7,548,000	7,514,000
Diluted	7,661,000	7,525,000	7,635,000	7,514,000