Long-Term Debt (Schedule of Interest Costs) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Long-Term Debt [Abstract]
Interest expense	$ 311	$ 467	$ 678	$ 936
Interest capitalized	12	9	29	38
Total interest cost	$ 323	$ 476	$ 707	$ 974