RETIREMENT PLANS (Tables)

6 Months Ended

Jun. 30, 2019

Pension Plan [Member]

Defined Benefit Plan Disclosure [Line Items]

Net Periodic Benefit Cost

The components of net periodic benefit cost for the Company’s defined benefit plans for the three months and six months ended June 30, 2019 and 2018 were as follows (in thousands):

	Pension Benefits
	Pension Plan						SERP
	Three months ended June 30,						Three months ended June 30,
	2019			2018			2019		2018
Components of net periodic benefit cost:
Service cost	$	1,914		$	1,867		$	—	$	—
Interest cost		4,040			3,974			13		12
Expected return on plan assets		(5,254	)		(5,693	)		—		—
Amortization of actuarial loss		41			740			7		6
Net periodic benefit cost	$	741		$	888		$	20	$	18

	Pension Benefits
	Pension Plan						SERP
	Six months ended June 30,						Six months ended June 30,
	2019			2018			2019		2018
Components of net periodic benefit cost:
Service cost	$	3,682		$	4,094		$	—	$	—
Interest cost		8,247			7,605			26		24
Expected return on plan assets		(10,478	)		(11,016	)		—		—
Amortization of actuarial loss		719			1,445			14		12
Net periodic benefit cost	$	2,170		$	2,128		$	40	$	36

Other Postretirement Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Net Periodic Benefit Cost

The components of net periodic benefit cost for the Company’s postretirement benefit plan for the three months and six months ended June 30, 2019 and 2018 were as follows (in thousands):

	Other Postretirement Benefits
	Postretirement Welfare Plan
	Three months ended June 30,						Six months ended June 30,
	2019			2018			2019			2018
Components of net periodic benefit cost:
Service cost	$	—		$	—		$	—		$	—
Interest cost		8			6			16			12
Amortization of actuarial gain		(135	)		(149	)		(270	)		(298	)
Net periodic benefit cost	$	(127	)	$	(143	)	$	(254	)	$	(286	)