XML 63 R53.htm IDEA: XBRL DOCUMENT v3.3.1.900
Financial Instruments and Fair Value Measurements (Estimated Fair Values of Financial Instruments) (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Sep. 30, 2015
Notes receivable from municipalities, Carrying Cost $ 16,025 $ 15,638
Long-term debt, excluding current portion, Carrying Cost (617,000) (850,000)
Fair Value, Inputs, Level 2 [Member]    
Notes receivable from municipalities, Estimated Fair Value 16,988 16,112
Long-term debt, excluding current portion, Estimated Fair Value $ (647,909) $ (873,734)