Accumulated Other Comprehensive Income

9 Months Ended

Jun. 30, 2017

Equity [Abstract]

Accumulated Other Comprehensive Income

Note 11 — Accumulated Other Comprehensive Income

The tables below present changes in AOCI, net of tax, during the three and nine months ended June 30, 2017 and 2016:

Three Months Ended June 30, 2017	Postretirement Benefit Plans			Derivative Instruments			Total
AOCI — March 31, 2017	$	(11,356	)	$	(18,808	)	$	(30,164	)
Reclassifications of benefit plan actuarial losses and prior service costs	239			—			239
Reclassifications of net losses on IRPAs	—			501			501
AOCI — June 30, 2017	$	(11,117	)	$	(18,307	)	$	(29,424	)
Three Months Ended June 30, 2016	Postretirement Benefit Plans			Derivative Instruments			Total
AOCI — March 31, 2016	$	(8,956	)	$	(20,607	)	$	(29,563	)
Reclassifications of benefit plan actuarial losses and prior service costs	160			—			160
Reclassifications of net losses on IRPAs	—			357			357
AOCI — June 30, 2016	$	(8,796	)	$	(20,250	)	$	(29,046	)

Nine Months Ended June 30, 2017	Postretirement Benefit Plans			Derivative Instruments			Total
AOCI — September 30, 2016	$	(11,834	)	$	(19,784	)	$	(31,618	)
Reclassifications of benefit plans actuarial losses and prior service costs	717			—			717
Reclassifications of net losses on IRPAs	—			1,477			1,477
AOCI — June 30, 2017	$	(11,117	)	$	(18,307	)	$	(29,424	)
Nine Months Ended June 30, 2016	Postretirement Benefit Plans			Derivative Instruments			Total
AOCI — September 30, 2015	$	(9,276	)	$	(4,410	)	$	(13,686	)
Net losses on IRPAs	—			(16,943		)	(16,943		)
Reclassifications of benefit plans actuarial losses and prior service costs	480			—			480
Reclassifications of net losses on IRPAs	—			1,103			1,103
AOCI — June 30, 2016	$	(8,796	)	$	(20,250	)	$	(29,046	)