EMPLOYEE BENEFIT PLANS

3 Months Ended

Mar. 31, 2017

Pension and Other Postretirement Benefit Expense [Abstract]

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS

Components of the net periodic benefit cost of PLC's defined benefit pension plan for the three months ended March 31, 2017 and 2016, are as follows: 

	For The Three Months Ended March 31,
	2017					2016
	Defined Benefit Pension Plan			Excess Benefit Plan		Defined Benefit Pension Plan			Excess Benefit Plan
	(Dollars In Thousands)
Service cost — benefits earned during the period	$	3,348		$	334	$	2,906		$	313
Interest cost on projected benefit obligation	2,191			297		2,737			438
Expected return on plan assets	(3,352		)	—		(3,605		)	—
Amortization of prior service cost	—			—		—			—
Amortization of actuarial losses	—			118		—			—
Preliminary net periodic benefit cost	2,187			749		2,038			751
Settlement/curtailment expense	—			—		—			—
Total net periodic benefit costs	$	2,187		$	749	$	2,038		$	751

During the three months ended March 31, 2017, PLC did not make a contribution to its defined benefit pension plan for the 2016 plan year or 2017 plan year. PLC will make contributions in future periods as necessary to at least satisfy minimum funding requirements. PLC may also make additional contributions in future periods to maintain an adjusted funding target attainment percentage (“AFTAP”) of at least 80% and to avoid certain Pension Benefit Guaranty Corporation (“PBGC”) reporting triggers.