Pension and Other Postretirement Plans

3 Months Ended

Mar. 31, 2017

Compensation and Retirement Disclosure [Abstract]

Pension and Other Postretirement Plans - MGE Energy and MGE.

MGE maintains qualified and nonqualified pension plans, health care, and life insurance benefits. Additionally, MGE has defined contribution 401(k) benefit plans.

The following table presents the components of net periodic benefit costs recognized for the three months ended March 31, 2017 and 2016. A portion of the net periodic benefit cost is capitalized within the consolidated balance sheets.

		Three Months Ended
		March 31,
(In thousands)		2017		2016
Pension Benefits
Components of net periodic benefit cost:
Service cost	$	1,332	$	1,381
Interest cost		3,119		3,089
Expected return on assets		(5,742)		(5,593)
Amortization of:
Prior service (credit) cost		(4)		2
Actuarial loss		1,464		1,356
Net periodic benefit cost	$	169	$	235

Postretirement Benefits
Components of net periodic benefit cost:
Service cost	$	206	$	324
Interest cost		444		674
Expected return on assets		(472)		(705)
Amortization of:
Transition obligation		-		1
Prior service credit		(436)		(667)
Actuarial loss		129		159
Net periodic benefit (credit) cost	$	(129)	$	(214)