Pension and Other Post-Retirement Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2015

Compensation and Retirement Disclosure [Abstract]

Schedule of funded status and amounts recognized for defined benefit pension and other post-retirement benefit plans

The following table sets forth the defined benefit pension and other post-retirement benefit plans’ funded status and amounts recognized for those plans in the Company’s Consolidated Balance Sheets.  Refer to Note 2 for further information related to the Equitable Gas Transaction.

	For the Years Ended December 31,
	2015			2014			2015			2014
	Pension Benefits						Other Benefits
	(Thousands)
Change in benefit obligation:
Benefit obligation at beginning of year	$	21,704		$	21,828		$	18,741		$	18,253
Service cost	350			350			762			669
Interest cost	746			820			634			693
Amendments	—			—			—			227
Actuarial loss (gain)	2,770			2,412			(361		)	1,190
Benefits paid	(1,981		)	(1,988		)	(2,141		)	(2,291		)
Expenses paid	(367		)	(262		)	—			—
Settlements	(177		)	(1,456		)	—			—
Benefit obligation at end of year	$	23,045		$	21,704		$	17,635		$	18,741
Change in plan assets:
Fair value of plan assets at beginning of year	$	18,323		$	20,089		$	823		$	493
Actual (loss) gain on plan assets	(32		)	1,217			—			—
Contributions	1,175			723			287			330
Benefits paid	(1,981		)	(1,988		)	—			—
Expenses paid	(367		)	(262		)	—			—
Settlements	(177		)	(1,456		)	—			—
Fair value of plan assets at end of year	16,941			18,323			1,110			823
Funded status at end of year	$	(6,104	)	$	(3,381	)	$	(16,525	)	$	(17,918	)

Schedule of amounts recognized in statement of financial position

Amounts recognized in the statement of financial position consist of:
Current liabilities	$	(6,104	)	$	—		$	(1,376	)	$	(924	)
Noncurrent liabilities	—			(3,381		)	(15,149		)	(16,994		)
Net amounts recognized	$	(6,104	)	$	(3,381	)	$	(16,525	)	$	(17,918	)
Amounts recognized in accumulated OCI, net of tax, consist of:
Net loss	$	9,674		$	8,082		$	7,610		$	8,273
Net prior service	—			—			257			285
Net amount recognized	$	9,674		$	8,082		$	7,867		$	8,558

Schedule of components of net periodic benefit cost

The Company’s costs related to its defined benefit pension and other post-retirement benefit plans were as follows:

	For the Years Ended December 31,
	2015			2014			2013			2015			2014			2013
	Pension Benefits									Other Benefits
	(Thousands)
Components of net periodic benefit cost:
Service cost	$	350		$	350		$	500		$	762		$	669		$	905
Interest cost	746			820			1,935			634			693			1,110
Expected return on plan assets	(627		)	(1,377		)	(3,323		)	—			—			—
Amortization of prior service cost	—			—			—			(306		)	(446		)	(845		)
Recognized net actuarial loss	746			709			2,306			793			879			1,760
Settlement loss and special termination benefits	122			879			381			—			—			—
Subtotal	1,337			1,381			1,799			1,883			1,795			2,930
Net periodic benefit cost of discontinued operations	—			—			1,552			—			—			1,356
Net periodic benefit cost	$	1,337		$	1,381		$	247		$	1,883		$	1,795		$	1,574

Schedule of amount recognized in other comprehensive income

Currently, the Company recognizes expense for on-going post-retirement benefits other than pensions, a portion of which expense is subject to recovery in the approved rates of its rate-regulated EQT Midstream business.

	For the Years Ended December 31,
	2015		2014		2013		2015			2014		2013
	Pension Benefits						Other Benefits
	(Thousands)
Other changes in plan assets and benefit obligations recognized in OCI, net of tax:
Net loss (gain)	$	1,592	$	558	$	712	$	(663	)	$	39	$	2,147
Net prior service (credit) cost	—		—		—		(28		)	179		416
Total recognized in OCI, net of tax	$	1,592	$	558	$	712	$	(691	)	$	218	$	2,563
Total recognized in net periodic benefit cost and OCI, net of tax	$	2,929	$	1,939	$	959	$	1,192		$	2,013	$	4,137

Schedule of weighted average assumption used to determine the benefit obligations

The following weighted average assumptions were used to determine the benefit obligations for the Company’s defined benefit pension and other post-retirement benefit plans:

	December 31,
	2015	2014	2015	2014
	Pension Benefits		Other Benefits
Discount rate	2.20%	3.60%	3.95%	3.60%
Rate of compensation increase	N/A	N/A	N/A	N/A

Schedule of weighted average assumption used to determine the net periodic benefit cost

The following weighted average assumptions were used to determine the net periodic benefit cost for the Company’s defined benefit pension and other post-retirement benefit plans:

	For the Years Ended December 31,
	2015		2014		2015		2014
	Pension Benefits				Other Benefits
Discount rate	3.60	%	4.00	%	3.60	%	4.00	%
Expected return on plan assets	3.75	%	7.75	%	N/A		N/A
Rate of compensation increase	N/A		N/A		N/A		N/A

Schedule of impact of one-percentage-point change in assumed health care cost trend rates

A one-percentage-point change in assumed health care cost trend rates would have had the following effects:

	One-Percentage-Point Increase						One-Percentage-Point Decrease
	2015		2014		2013		2015			2014			2013
	(Thousands)
Increase (decrease) to total of service and interest cost components	$	10	$	13	$	25	$	(11	)	$	(14	)	$	(26	)
Increase (decrease) to post-retirement benefit obligation	$	268	$	228	$	220	$	(278	)	$	(229	)	$	(223	)

Schedule of the entity's asset allocation

The Company’s asset allocation for the Retirement Plan at December 31, 2015 and 2014 and target allocation for 2016 by asset category are as follows:

	Target	Percentage of Plan Assets at December 31,
Asset Category	Allocation 2016	2015		2014
Domestic broadly diversified equity securities	0% - 10%	—	%	26	%
Fixed income securities	80% - 100%	99	%	63	%
International broadly diversified equity securities	0%	—	%	8	%
Cash and equivalent investments	0% - 20%	1	%	3	%
		100	%	100	%