EMPLOYEE BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2018

Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]

Components of the Net Periodic Benefit Cost of the Company's Defined Benefit Pension Plan and Unfunded Excess Benefit Plan

Components of the net periodic benefit cost for the three months ended March 31, 2018 and 2017, are as follows:

	For The Three Months Ended March 31,
	2018					2017
	Qualified Pension Plan			Nonqualified Excess Pension Plan		Qualified Pension Plan			Nonqualified Excess Pension Plan
	(Dollars In Thousands)
Service cost — benefits earned during the period	$	3,441		$	387	$	3,348		$	334
Interest cost on projected benefit obligation	2,397			359		2,191			297
Expected return on plan assets	(4,026		)	—		(3,352		)	—
Amortization of prior service cost	—			—		—			—
Amortization of actuarial loss/(gain)	—			265		—			118
Preliminary net periodic benefit cost	1,812			1,011		2,187			749
Settlement/curtailment expense	—			—		—			—
Total net periodic benefit costs	$	1,812		$	1,011	$	2,187		$	749