16. Benefit Plans

The Company sponsors an unfunded supplemental executive retirement plan (“SERP”) for certain key executives. On March 11, 2019, the Company’s board of directors approved an amendment to the SERP to freeze the SERP. As a result of such amendment, effective July 1, 2019, there will be no new accruals of benefits, including service accruals. Existing benefits under the SERP, as of the effective date of the amendment described above, will otherwise continue in accordance with the terms of the SERP.

The following table sets forth the components of net periodic benefit cost for the Company’s pension and postretirement benefit plans for the three months ended March 31, 2019 and 2018:


	Income line item where recognized in	Pension Benefits				Other Benefits
(dollars in thousands)	the consolidated statements of income	2019		2018		2019		2018
Three Months Ended March 31,
Service cost	Salaries and employee benefits	$	17	$	174	$	159	$	212
Interest cost	Other noninterest expense		2,044		1,794		206		185
Expected return on plan assets	Other noninterest expense		(1,195)		(1,240)		—		—
Prior service credit	Other noninterest expense		—		—		(107)		(107)
Recognized net actuarial loss	Other noninterest expense		1,564		1,611		(76)		—
Total net periodic benefit cost		$	2,430	$	2,339	$	182	$	290