Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2015

Defined Benefit Plan Disclosure [Line Items]

Schedule of Allocation of Plan Assets

The percentages of total plan asset fair value by investment category of our Pension Plan assets at December 31 were as follows:

	2015		2014
Equity securities	26	%	27	%
Real estate	5		5
Fixed income funds	59		58
Cash and cash equivalents	1		2
Hedge funds	9		8
Total	100	%	100	%

Schedule of Contribution to Employee Plans

Contributions for the years ended December 31 were as follows (in thousands):

	2015		2014
Defined Benefit Plans
Defined Benefit Pension Plan	$	—	$	1,696
Non-pension Defined Benefit Postretirement Healthcare Plan	$	267	$	399
Supplemental Non-qualified Defined Benefit Plan	$	211	$	217
Defined Contribution Plans
Company Retirement Contribution	$	811	$	638
Matching Contributions	$	1,423	$	1,377

Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation

The following table sets forth a summary of changes in the fair value of the Defined Benefit Pension Plans’ Level 3 assets for the period ended December 31 (in thousands):

	2015
Balance, beginning of period	$	6,857
Purchase	93
Unrealized gain (loss)	63
Settlements	(19		)
Balance, end of period	$	6,994

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques

The following table presents the quantitative information about Level 3 fair value measurements (dollars in thousands):

	Fair Value at		Valuation	Level 3	Range (Weighted)
	December 31, 2015		Technique	Input	Average
Assets:
Common Collective Trust - Real Estate (a)	$	2,113	Market Approach	Redemption Restriction	N/A
Hedge Funds (b)	$	4,881	Market Approach	Redemption Restriction	N/A

_____________

(a) The underlying net asset value in the Common Collective Trust - Real Estate fund is determined by appraisal of the properties held in the Trust. As part of the Trustee's valuation process, properties are externally appraised generally on an annual basis. The appraisals are conducted by reputable independent appraisal firms and signed by appraisers that are members of the Appraisal Institute, with the professional designation of Member, Appraisal Institute. All external appraisals are performed in accordance with the Uniform Standards of Professional Appraisal Practices. We receive monthly statements from the Trustee along with the annual schedule of investments and rely on these reports for pricing the units of the fund. The fund does contain a participant withdrawal policy.

(b) The fair value of the Hedge Funds is determined based on pricing provided or reviewed by third-party administrator to our investment managers. While the input amounts used by the pricing vendor in determining fair value are not provided, and therefore, unavailable for our review, the asset results are reviewed and monitored to ensure the fair values are reasonable and in line with market experience in similar asset classes. Additionally, the audited financial statements of the funds are reviewed annually as they are issued.

Schedule of Changes in Projected Benefit Obligations

The following tables provide a reconciliation of the Employee Benefit Plan’s obligations and fair value of assets, components of the net periodic expense and elements of regulatory assets and liabilities and AOCI (in thousands):

Benefit Obligations

	Defined Benefit Pension Plan						Supplemental Non-qualified Defined Benefit Retirement Plans						Non-pension Defined Benefit Postretirement Healthcare Plan
	2015			2014			2015			2014			2015			2014
Change in benefit obligation:
Projected benefit obligation at beginning of year	$	71,178		$	60,223		$	3,599		$	3,131		$	6,038		$	5,850
Service cost	797			704			—			—			233			222
Interest cost	2,956			2,991			142			146			214			241
Actuarial loss (gain)	(5,650		)	11,879			(104		)	540			27			115
Benefits paid	(3,284		)	(4,452		)	(211		)	(218		)	(387		)	(488		)
Asset transfer (to) from affiliate	(38		)	(167		)	—			—			(7		)	24
Medicare Part D adjustment	—			—			—			—			(30		)	(15		)
Plan participants’ contributions	—			—			—			—			120			89
Projected benefit obligation at end of year	$	65,959		$	71,178		$	3,426		$	3,599		$	6,208		$	6,038

Schedule of Changes in Fair Value of Plan Assets

A reconciliation of the fair value of Plan assets (as of the December 31 measurement date) is as follows (in thousands):

	Defined Benefit Pension Plan						Supplemental Non-qualified Defined Benefit Retirement Plans					Non-pension Defined Benefit Postretirement Healthcare Plan
	2015			2014			2015			2014		2015			2014
Beginning market value of plan assets	$	59,098		$	56,405		$	—		$	—	$	—		$	—
Investment income	(1,057		)	5,462			—			—		—			—
Benefits paid	(3,284		)	(4,452		)	(211		)	—		(387		)	—
Participant contributions	—			—			—			—		120			—
Employer contributions	—			1,696			211			—		267			—
Asset transfer to affiliate	(34		)	(13		)	—			—		—			—
Ending market value of plan assets	$	54,723		$	59,098		$	—		$	—	$	—		$	—

Schedule of Amounts Recognized in Balance Sheet

Amounts recognized in the Balance Sheets at December 31 consist of (in thousands):

	Defined Benefit Pension Plan						Supplemental Non-qualified Defined Benefit Retirement Plans						Non-pension Defined Benefit Postretirement Plan
	2015			2014			2015			2014			2015			2014
Regulatory asset (liability)	$	19,816		$	22,717		$	—		$	—		$	(1,946	)	$	2,306
Current liability	$	—		$	—		$	(216	)	$	(217	)	$	(619	)	$	(519	)
Non-current liability	$	(11,236	)	$	(12,080	)	$	(3,210	)	$	(3,382	)	$	(5,587	)	$	(5,519	)

Schedule of Accumulated and Projected Benefit Obligations

Accumulated Benefit Obligation (in thousands)

	Defined Benefit Pension Plan				Supplemental Non-qualified Defined Benefit Retirement Plans				Non-pension Defined Benefit Postretirement Healthcare Plan
	2015		2014		2015		2014		2015		2014
Accumulated benefit obligation	$	62,240	$	65,699	$	3,426	$	3,599	$	6,208	$	6,038

Schedule of Net Benefit Costs

Components of Net Periodic Expense (in thousands)

	Defined Benefit Pension Plan									Supplemental Non-qualified Defined Benefit Retirement Plans						Non-pension Defined Benefit Postretirement Healthcare Plan
	2015			2014			2013			2015		2014		2013		2015			2014			2013
Service cost	$	797		$	704		$	852		$	—	$	—	$	—	$	233		$	222		$	216
Interest cost	2,956			2,991			2,969			142		146		133		214			241			239
Expected return on assets	(3,935		)	(3,702		)	(3,764		)	—		—		—		—			—			—
Amortization of prior service cost (credits)	43			43			43			—		—		—		(336		)	(335		)	(278		)
Amortization of transition obligation	—			—			2,609			—		—		—		—			—			—
Recognized net actuarial loss (gain)	2,196			940			—			93		45		66		—			—			9
Net periodic expense	$	2,057		$	976		$	2,709		$	235	$	191	$	199	$	111		$	128		$	186

Schedule of Net Periodic Benefit Cost Not yet Recognized

Amounts included in AOCI, after-tax, that have not yet been recognized as components of net periodic benefit cost at December 31 were as follows (in thousands):

	Defined Benefit Pension Plan				Supplemental Non-qualified Defined Benefit Retirement Plans					Non-pension Defined Benefit Postretirement Healthcare Plan
	2015		2014		2015		2014			2015		2014
Net loss	$	—	$	—	$	673	$	(801	)	$	—	$	—
Prior service cost	—		—		—		—			—		—
Total accumulated other comprehensive income (loss)	$	—	$	—	$	673	$	(801	)	$	—	$	—

Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year

The amounts in AOCI, regulatory assets or regulatory liabilities, after-tax, expected to be recognized as a component of net periodic benefit cost during calendar year 2016 are as follows (in thousands):

	Defined Benefits Pension Plan		Supplemental Non-qualified Defined Benefit Retirement Plans		Non-pension Defined Benefit Postretirement Healthcare Plan
Net gain (loss)	$	1,297	$	53	$	—
Prior service cost	28		—		(218		)
Total net periodic benefit cost expected to be recognized during calendar year 2016	$	1,325	$	53	$	(218	)

Schedule of Assumptions Used

Assumptions

	Defined Benefit Pension Plan						Supplemental Non-qualified Defined Benefit Retirement Plans						Non-pension Defined Benefit Postretirement Healthcare Plan
	2015		2014		2013		2015		2014		2013		2015		2014		2013
Weighted-average assumptions used to determine benefit obligations:
Discount rate	4.63	%	4.25	%	5.10	%	4.29	%	3.98	%	4.68	%	4.03	%	3.70	%	4.45	%
Rate of increase in compensation levels	3.57	%	3.86	%	3.86	%	N/A		N/A		N/A		N/A		N/A		N/A
Weighted-average assumptions used to determine net periodic benefit cost for plan year:
Discount rate	4.25	%	5.10	%	4.35	%	3.98	%	4.68	%	3.88	%	3.70	%	4.45	%	3.65	%
Expected long-term rate of return on assets (a)	6.75	%	6.75	%	7.25	%	N/A		N/A		N/A		N/A		N/A		N/A
Rate of increase in compensation levels	3.86	%	3.86	%	3.91	%	N/A		N/A		N/A		N/A		N/A		N/A

_____________________________

(a) The expected rate of return on plan assets is 6.75% for the calculation of the 2016 net periodic pension cost.

Schedule of Health Care Cost Trend Rates

The healthcare benefit obligation was determined at December 31 as follows:

	2015		2014
Healthcare trend rate pre-65
Trend for next year	6.35	%	7.50	%
Ultimate trend rate	4.50	%	4.50	%
Year Ultimate Trend Reached	2024		2027
Healthcare trend rate post-65
Trend for next year	5.20	%	6.25	%
Ultimate trend rate	4.50	%	4.50	%
Year Ultimate Trend Reached	2023		2024

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates

The table below shows the estimated impacts of an increase or decrease to our healthcare trend rate for our Retiree Health Care Plan (in thousands):

Change in Assumed Trend Rate	Service and Interest Costs			Accumulated Periodic Postretirement Benefit Obligation
1% increase	$	10		$	221
1% decrease	$	(1	)	$	(205	)

Schedule of Expected Benefit Payments

The following benefit payments, which reflect future service, are expected to be paid (in thousands):

	Defined Benefit Pension Plan		Supplemental Non-qualified Defined Benefit Retirement Plans		Non-pension Defined Benefit Postretirement Healthcare Plan
2016	$	3,492	$	216	$	619
2017	$	3,594	$	248	$	618
2018	$	3,677	$	246	$	613
2019	$	3,814	$	243	$	607
2020	$	3,911	$	240	$	621
2021-2025	$	21,108	$	1,583	$	2,841

Defined Benefit Pension Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule of Allocation of Plan Assets

The following tables set forth, by level within the fair value hierarchy, the assets that were accounted for at fair value on a recurring basis as of December 31 (in thousands):

Defined Benefit Pension Plan	2015
	Level 1		Level 2		Level 3		Total Fair Value
Common Collective Trust - Cash and Cash Equivalents	$	—	$	498	$	—	$	498
Common Collective Trust - Equity	—		14,198		—		14,198
Common Collective Trust - Fixed Income	—		32,615		—		32,615
Common Collective Trust - Real Estate	—		418		2,113		2,531
Hedge Funds	—		—		4,881		4,881
Total investments measured at fair value	$	—	$	47,729	$	6,994	$	54,723

Defined Benefit Pension Plan	2014
	Level 1		Level 2		Level 3		Total Fair Value
Common Collective Trust - Cash and Cash Equivalents	$	—	$	899	$	—	$	899
Common Collective Trust - Equity	—		16,107		—		16,107
Common Collective Trust - Fixed Income	—		34,474		—		34,474
Common Collective Trust - Real Estate	—		761		1,918		2,679
Hedge Funds	—		—		4,939		4,939
Total investments measured at fair value	$	—	$	52,241	$	6,857	$	59,098