RETIREMENT PLANS (Tables)

9 Months Ended

Sep. 30, 2017

Defined Benefit Plan Disclosure [Line Items]

The components of net periodic benefit cost for the Company’s defined benefit plans for the three months and nine months ended September 30, 2017 and 2016 were as follows (in thousands):

	Pension Benefits
	Pension Plan						SERP
	Three months ended September 30,						Three months ended September 30,
	2017			2016			2017		2016
Components of net periodic benefit cost:
Service cost	$	1,742		$	3,351		$	—	$	—
Interest cost		3,320			3,531			14		16
Expected return on plan assets		(4,595	)		(4,202	)		—		—
Amortization of actuarial loss		981			1,372			7		7
Net periodic benefit cost	$	1,448		$	4,052		$	21	$	23

	Pension Benefits
	Pension Plan						SERP
	Nine months ended September 30,						Nine months ended September 30,
	2017			2016			2017		2016
Components of net periodic benefit cost:
Service cost	$	8,934		$	10,053		$	—	$	—
Interest cost		10,409			10,594			43		49
Expected return on plan assets		(13,600	)		(12,606	)		—		—
Amortization of actuarial loss		3,419			4,115			21		20
Net periodic benefit cost	$	9,162		$	12,156		$	64	$	69

Other Postretirement Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Benefit Cost

The components of net periodic benefit cost for the Company’s postretirement benefit plan for the three months and nine months ended September 30, 2017 and 2016 were as follows (in thousands):

	Other Postretirement Benefits						Other Postretirement Benefits
	Postretirement Welfare Plan						Postretirement Welfare Plan
	Three months ended September 30,						Nine months ended September 30,
	2017			2016			2017			2016
Components of net periodic benefit cost:
Service cost	$	—		$	—		$	—		$	—
Interest cost		6			7			20			22
Amortization of actuarial gain		(166	)		(186	)		(501	)		(560	)
Net periodic benefit cost	$	(160	)	$	(179	)	$	(481	)	$	(538	)