Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2019

Compensation And Retirement Disclosure [Abstract]

Net Periodic Costs

Net periodic costs related to the Company’s unfunded supplemental benefit plans includes the following components:

	Three Months Ended June 30,						Six Months Ended June 30,
(in thousands)	2019			2018			2019			2018
Expense:
Service costs	$	71		$	130		$	141		$	260
Interest costs		2,279			2,018			4,558			4,036
Amortization of net actuarial loss		915			1,205			1,830			2,410
Amortization of prior service credit		(1,017	)		(1,045	)		(2,035	)		(2,090	)
	$	2,248		$	2,308		$	4,494		$	4,616