EMPLOYEE BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2020

Postretirement Medical Benefit Plans

Schedule of employee benefit plan obligations

The postretirement medical benefit and postemployment medical benefit obligations are determined annually (during the fourth quarter) by an independent actuary and are included in accumulated postretirement benefit and postemployment obligations on our consolidated statements of financial position as follows (dollars in thousands):

	March 31,
	2020
Postretirement medical benefit obligation at beginning of period	$	10,195
Service cost		141
Interest cost		88
Benefit payments (net of contributions by participants)		(155)
Postretirement medical benefit obligation at end of period	$	10,269
Postemployment medical benefit obligation at end of period		375
Total postretirement and postemployment medical obligations at end of period	$	10,644

Schedule of the net unrecognized actuarial gains and losses related to employee benefit plan obligations

The net unrecognized actuarial gains and losses related to the postretirement medical benefit obligations are included in accumulated other comprehensive income as follows (dollars in thousands):

	2020
Amounts included in accumulated other comprehensive income at beginning of period	$	(1,387)
Amortization of actuarial (gain) loss into income		11
Amortization of prior service credit into other income		(20)
Amounts included in accumulated other comprehensive income at end of period	$	(1,396)

NRECA Executive Benefit Restoration Plan

Schedule of employee benefit plan obligations

The NRECA Executive Benefit Restoration Plan obligations are determined annually (during the first quarter of the subsequent year) by an NRECA actuary and are included in accumulated postretirement benefit and postemployment obligations on our consolidated statements of financial position as follows (dollars in thousands):

	March 31,
	2020
Executive benefit restoration obligation at beginning of period	$	674
Service cost		206
Interest cost		291
Plan amendments - prior service cost		5,218
Actuarial loss		2,155
Executive benefit restoration at end of period	$	8,544

Schedule of the net unrecognized actuarial gains and losses related to employee benefit plan obligations

The net unrecognized actuarial gains and losses related to the executive benefit restoration obligations are included in accumulated other comprehensive income as follows (dollars in thousands):

	March 31,
	2020
Amounts included in accumulated other comprehensive income at beginning of period	$	(130)
Plan amendments - prior service cost		(5,218)
Amortization of prior service cost into other income		942
Unrecognized actuarial loss		(2,155)
Amounts included in accumulated other comprehensive income at end of period	$	(6,561)