Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2022

Compensation And Retirement Disclosure [Abstract]

Summary of Components of Net Periodic Pension Cost

The following table summarizes the components of net periodic pension cost for the three months ended March 31, 2022 and 2021.

	Three Months Ended
	March 31, 2022		March 31, 2021
(Dollars in thousands)
Interest cost	$	218	$	206
Net amortization		83		97
Net periodic pension cost	$	301	$	303