EMPLOYEE BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2026

Schedule of Employee Benefit Plan Obligations

The postretirement medical benefit and post employment medical benefit obligations are determined annually (during the fourth quarter) by an independent actuary and are included in accumulated postretirement benefit and post employment obligations on Tri-State's consolidated statements of financial position as follows (dollars in thousands):


	Three Months Ended March 31, 2026
Postretirement medical benefit obligation at beginning of period	$	347

Interest cost	6
Benefit payments (net of contributions by participants)	(57)


Postretirement medical benefit obligation at end of period	$	296
Postemployment medical benefit obligation at end of period	99
Total postretirement and postemployment medical obligations at end of period	$	395

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 post employment obligations on Tri-State's consolidated statements of financial position as follows (dollars in thousands):


	Three Months Ended March 31, 2026
Executive benefit restoration obligation at beginning of period	$	8,534
Service cost	125
Interest cost	106




Executive benefit restoration at end of period	$	8,765
Fair value of plan assets at beginning of period	$	10,360


Actual return on plan assets	46
Fair value of plan assets at end of period	$	10,406
Net asset at end of period	$	1,641

Schedule of Net Unrecognized Actuarial Gains and Losses on 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):


	Three Months Ended March 31, 2026
Amounts included in accumulated other comprehensive income at beginning of period	$	161
Amortization of prior service credit into other income	—



Amounts included in accumulated other comprehensive income at end of period	$	161

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):


	Three Months Ended March 31, 2026
Accumulated other comprehensive loss at beginning of period	$	1,368

Amortization of prior service cost into other income	81



Accumulated other comprehensive loss at end of period	$	1,449