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

6 Months Ended

Mar. 31, 2020

Credit Facilities, Short-term Borrowings and Long-term Debt [Abstract]

Schedule of Long-term Debt

	March 31,		September 30,
	2020		2019
Long-term portion of revolving credit facility - Floating rate (LIBOR plus 0.875% - 1.75%), due June 19, 2024; unsecured	$	142,901	$	42,297
Series G notes – 3.42%, due November 15, 2020; unsecured		50,000		50,000
Series H notes – 4.03%, due November 15, 2023; unsecured		25,000		25,000
Series I notes – 4.18%, due November 15, 2025; unsecured		25,000		25,000
Series J notes – Floating rate (LIBOR plus 1.25%), due November 15, 2020; unsecured		50,000		50,000
Series K notes – 4.03%, due November 15, 2023; unsecured		50,000		50,000
Series L notes – 4.18%, due November 15, 2025; unsecured		50,000		50,000
Series M notes – 1.12% due September 23, 2026; unsecured		44,162		43,770
Series N notes – 1.31% due September 23, 2028; unsecured		85,011		84,257
Series O notes – 1.57% due September 23, 2031; unsecured		47,474		47,053
Series P notes – 4.27% due May 30, 2025; unsecured		85,000		85,000
Series Q notes – 4.35% due May 30, 2027; unsecured		85,000		85,000
Series R notes – 4.41% due May 30, 2029; unsecured		75,000		75,000
Series S notes – 4.46% due May 30, 2030; unsecured		75,000		75,000
Series T notes – 4.61% due May 30, 2033; unsecured		80,000		80,000
Finance leases (Note 5)		3,617		-
Unamortized debt issuance costs		(2,299)		(2,478)
Total long-term debt		970,866		864,899
Less: Current portion of long-term debt		101,643		-
Long-term debt, less current portion	$	869,223	$	864,899