9.Pension Plan and Postretirement Benefits Other Than Pension

Benefits payable under our noncontributory retirement plan that covers substantially all employees and certain vested employees of our former parent company (the “Pension Plan”) were based on employees’ years of service and compensation during the final 10 years of employment. On July 26, 2017, the Compensation Committee of the Company’s Board of Directors approved an amendment to freeze the Pension Plan, effective September 30, 2017. After September 30, 2017, participants in the Pension Plan ceased accruing additional benefits for future service or compensation. Participants retain benefits accumulated as of September 30, 2017 in accordance with the terms of the Pension Plan. The Company intends to terminate the Pension Plan in standard termination with an expected completion date in 2020.

We also sponsor an unfunded defined benefit postretirement medical plan that previously covered substantially all employees, as well as Advisors. The medical plan is contributory with participant contributions adjusted annually. The medical plan does not provide for benefits after age 65 with the exception of a small group of employees that were grandfathered when this plan was established. During the third quarter of 2016, the Company amended this plan to discontinue the availability of coverage for any individuals who retire after December 31, 2016.

The components of net periodic pension and other postretirement costs related to these plans were as follows:


				Other
	Pension Benefits			Postretirement Benefits
	Three months ended March 31,				Three months ended March 31,
	2019		2018		2019	2018
		(in thousands)
Components of net periodic benefit cost:
Interest cost	$	1,528	1,508	$	8	14
Expected return on plan assets		(1,590)	(2,069)		—	—
Actuarial gain amortization		—	—		(124)	(30)
Prior service credit amortization		—	—		—	(1)
Total	$	(62)	(561)	$	(116)	(17)