XML 36 R23.htm IDEA: XBRL DOCUMENT v3.22.1

Employee Benefit Plans: (Tables)

3 Months Ended

Mar. 31, 2022

Retirement Benefits [Abstract]

Schedule of components of net periodic benefit costs, before allocation to the overhead pool, for Registrant's pension plan, postretirement plan, and SERP

The components of net periodic benefit costs for Registrant’s pension plan, postretirement medical benefit plan and SERP for the three months ended March 31, 2022 and 2021 were as follows:

						For The Three Months Ended March 31,
						Pension Benefits												Other Postretirement Benefits												SERP
(dollars in thousands)						2022						2021						2022						2021						2022						2021
Components of Net Periodic Benefits Cost:
Service cost						$	1,480					$	1,625					$	33					$	40					$	298					$	348
Interest cost						1,844						1,712						16						31						256						229
Expected return on plan assets						(3,292)						(3,134)						(147)						(134)						—						—
Amortization of prior service cost						109						109						—						—						—						—
Amortization of actuarial (gain) loss						—						993						(412)						(287)						145						419
Net periodic benefits costs under accounting standards						141						1,305						(510)						(350)						699						996
Regulatory adjustment - deferred						—						(351)						—						—						—						—
Total expense (benefit) recognized, before surcharges and allocation to overhead pool						$	141					$	954					$	(510)					$	(350)					$	699					$	996

X

- References

No definition available.

+ Details

Name:	us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

+ Details

Name:	us-gaap_ScheduleOfNetBenefitCostsTableTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration