Credit Facilities, Short-term Borrowings and Long-term Debt (Tables)

9 Months Ended

Jun. 30, 2015

Debt Disclosure

Schedule of Long-term Debt Instruments [Table Text Block]

	June 30,		September 30,
	2015		2014
Revolving credit facility - Floating rate (LIBOR plus 0.85% - 1.65%), due April 2020, unsecured		375,000		210,000
Series C notes – 5.92%, due October 2015; unsecured		50,000		50,000
Series D notes – 6.39%, due October 2018; unsecured		100,000		100,000
Series E notes – 7.81%, due April 2016; unsecured		57,000		57,000
Series F notes – 8.24%, due April 2019; unsecured		43,000		43,000
Series G notes – 3.42%, due November 2020; unsecured		50,000		50,000
Series H notes – 4.03%, due November 2023; unsecured		25,000		25,000
Series I notes – 4.18%, due November 2025; unsecured		25,000		25,000
Series J notes – Floating rate (LIBOR plus 1.25%), due November 2020; unsecured		50,000		50,000
Series K notes – 4.03%, due November 2023; unsecured		50,000		50,000
Series L notes – 4.18%, due November 2025; unsecured		50,000		50,000
Total long-term debt	$	875,000	$	710,000