Employee Benefit Plans:

3 Months Ended

Mar. 31, 2019

Defined Benefit Plan [Abstract]

Employee Benefit Plans

EMPLOYEE BENEFIT PLANS

The components of net periodic benefit cost for the Defined Benefit Pension Plan were as follows (in thousands):

	Three Months Ended March 31,
	2019			2018
Service cost	$	91		$	129
Interest cost	603			548
Expected return on plan assets	(851		)	(886		)
Prior service cost	2			11
Net loss (gain)	305			516
Net periodic benefit cost	$	150		$	318

Defined Benefit Postretirement Healthcare Plan

The components of net periodic benefit cost for the Defined Benefit Postretirement Healthcare Plan were as follows (in thousands):

	Three Months Ended March 31,
	2019			2018
Service cost	$	37		$	48
Interest cost	47			45
Prior service cost (benefit)	(84		)	(84		)
Net periodic benefit cost	$	—		$	9

Supplemental Non-qualified Defined Benefit Plans

The components of net periodic benefit cost for the Supplemental Non-qualified Defined Benefit Plans were as follows (in thousands):

	Three Months Ended March 31,
	2019		2018
Interest cost	$	29	$	27
Net loss (gain)	16		26
Net periodic benefit cost	$	45	$	53

Contributions

Contributions to the Defined Benefit Pension Plan are cash contributions made directly to the Pension Plan Trust account. Contributions to the Postretirement Healthcare and Supplemental Plans are made in the form of benefit payments. Contributions made for 2019 and anticipated contributions for 2019 and 2020 are as follows (in thousands):

	Contributions Three Months Ended March 31, 2019		Remaining Anticipated Contributions for 2019		Anticipated Contributions for 2020
Defined Benefit Pension Plan	$	—	$	1,753	$	1,841
Defined Benefit Postretirement Healthcare Plan	$	117	$	349	$	466
Supplemental Non-qualified Defined Benefit Plans	$	58	$	172	$	240