Pension & Postretirement Expenses (Tables)

9 Months Ended

Jun. 30, 2015

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

Summary of Pension and Postretirement Plan Expenses

	Three Months Ended June 30,					Nine Months Ended June 30,
	2014			2015		2014		2015
Service cost	$	24		27		71		81
Interest cost	62			60		184		181
Expected return on plan assets	(86		)	(92	)	(258	)	(276	)
Net amortization	37			43		110		128
Total	$	37		38		107		114