Pension and Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2019

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost (Credit)

The components of net periodic benefit cost (credit) were as follows:

	Three Months Ended June 30,
	Pension Plan						Supplemental Retirement Plan				Retirement Healthcare Plan
	2019			2018			2019		2018		2019			2018
	(dollars in thousands)
Net periodic benefit cost
Service cost	$	—		$	—		$	75	$	88	$	5		$	5
Interest cost		414			392			85		77		6			6
Expected return on assets		(651	)		(722	)		—		—		—			—
Amortization of prior service cost (credit)		(1	)		(1	)		—		—		—			—
Amortization of net actuarial loss		77			37			—		1		(1	)		(5	)
Net periodic benefit cost (credit)	$	(161	)	$	(294	)	$	160	$	166	$	10		$	6

	Six Months Ended June 30,
	Pension Plan						Supplemental Retirement Plan				Retirement Healthcare Plan
	2019			2018			2019		2018		2019			2018
	(dollars in thousands)
Net periodic benefit cost
Service cost	$	—		$	—			143	$	177		10		$	11
Interest cost		840			778			175		154		12			11
Expected return on assets		(1,360	)		(1,445	)		—		—		—			—
Amortization of prior service (credit)		(2	)		(2	)		—		—		—			—
Amortization of net actuarial loss		77			53			—		2		(2	)		—
Net periodic benefit cost (credit)	$	(445	)	$	(616	)	$	318	$	333	$	20		$	22