Note 10 - Pension Plan and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2018

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended March 31,
(in thousands)	2018			2017
Service Cost—Benefit Earned During the Period	$	1,615		$	1,407
Interest Cost on Projected Benefit Obligation		3,363			3,534
Expected Return on Assets		(5,300	)		(4,807	)
Amortization of Prior-Service Cost:
From Regulatory Asset		4			30
From Other Comprehensive Income 1		--			1
Amortization of Net Actuarial Loss:
From Regulatory Asset		1,784			1,273
From Other Comprehensive Income 1		44			31
Net Periodic Pension Cost 2	$	1,510		$	1,469
1 Corporate cost included in n onservice c ost c omponents of p ostretirement b enefits .
2 Allocation of Costs :
C osts included in OTP c apital e xpenditures	$	328		$	285
Service c osts included in e lectric o peration and m aintenance e xpenses		1,247			1,100
Service c osts included in o ther n onelectric e xpenses		40			34
Nonservice costs capitalized as regulatory assets		(21	)		--
Nonservice costs included in n onservice c ost c omponents of p ostretirement b enefits		(84	)		50

	Three Months Ended March 31,
(in thousands)	2018		2017
Service Cost—Benefit Earned During the Period	$	100	$	73
Interest Cost on Projected Benefit Obligation		399		422
Amortization of Prior-Service Cost:
From Regulatory Asset		4		4
From Other Comprehensive Income 1		10		9
Amortization of Net Actuarial Loss:
From Regulatory Asset		67		71
From Other Comprehensive Income 1		165		110
Net Periodic Pension Cost 2	$	745	$	689
1 Amortization of p rior s ervice c osts and net actuarial losses from o ther c omprehensive i ncome are included in n onservice c ost c omponents of p ostretirement b enefits on the face of the Company’s consolidated statements of income.
2 Allocation of Costs :
Service c osts included in e lectric o peration and m aintenance e xpenses	$	25	$	24
Service costs included in ot her n onelectric e xpenses		75		49
Nonservice c osts included in n onservice c ost c omponents of p ostretirement b enefits		645		616

	Three Months Ended March 31,
(in thousands)	2018			2017
Service Cost—Benefit Earned During the Period	$	382		$	356
Interest Cost on Projected Benefit Obligation		645			678
Amortization of Net Actuarial Loss:
From Regulatory Asset		412			233
From Other Comprehensive Income 1		10			6
Net Periodic Postretirement Benefit Cost 2	$	1,449		$	1,273
Effect of Medicare Part D Subsidy	$	(37	)	$	(140	)
1 Corporate cost included in n onservice c ost c omponents of p ostretirement b enefits .
2 Allocation of Costs :
C osts included in OTP c apital e xpenditures	$	78		$	247
Service c osts included in e lectric operation and maintenance expenses		294			278
Service c osts included in o ther n onelectric e xpenses		10			9
Nonservice costs capitalized as regulatory assets		217			--
Nonservice costs included in n onservice c ost c omponents of p ostretirement b enefits		850			739