Debt - Future Payment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Sep. 30, 2012
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	$ 8,943
Long-term Debt, Maturities, Repayments of Principal in Year Two	2,526
Interest Expense, Long-term Debt	(40)
Long-term Debt	12,471	10,480
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	238
Long-term Debt, Maturities, Repayments of Principal in Year Two	26
Interest Expense, Long-term Debt	(40)
Long-term Debt	224	284
Insurance Financing [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	2,247
Long-term Debt	2,247	196
Medium-term Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months	6,458
Long-term Debt, Maturities, Repayments of Principal in Year Two	2,500
Long-term Debt, Maturities, Repayments of Principal in Year Three	1,042
Long-term Debt	$ 10,000