Pension & Postretirement Expenses (Tables)

6 Months Ended

Mar. 31, 2015

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Summary of Pension and Postretirement Plan Expenses

	Three Months Ended March 31,					Six Months Ended March 31,
	2014			2015		2014		2015
Service cost	$	23		27		47		54
Interest cost	60			61		122		121
Expected return on plan assets	(86		)	(92	)	(172	)	(184	)
Net amortization	37			42		73		85
Total	$	34		38		70		76