Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2019

Retirement Benefits [Abstract]

Schedule Of Defined Benefit Plans Disclosures Text Block

The components of net periodic benefit costs, included in other operating expenses on the condensed consolidated statements of income, for the three and six months ended June 30, 2019 and 2018 were as follows (dollars in thousands):

	Pension Benefits						Other Benefits
	Three months ended June 30,						Three months ended June 30,
	2019			2018			2019			2018
Service cost	$	3,169		$	3,570		$	757		$	636
Interest cost	1,931			1,357			579			529
Expected return on plan assets	(1,692		)	(2,213		)	—			—
Amortization of prior service cost (credit)	61			82			(329		)	(329		)
Amortization of prior actuarial losses	1,231			769			644			498
Net periodic benefit cost	$	4,700		$	3,565		$	1,651		$	1,334

	Pension Benefits						Other Benefits
	Six months ended June 30,						Six months ended June 30,
	2019			2018			2019			2018
Service cost	$	6,307		$	6,224		$	1,514		$	1,272
Interest cost	3,317			2,687			1,159			1,059
Expected return on plan assets	(3,576		)	(3,767		)	—			—
Amortization of prior service cost (credit)	121			165			(658		)	(658		)
Amortization of prior actuarial losses	2,142			1,863			1,288			996
Net periodic benefit cost	$	8,311		$	7,172		$	3,303		$	2,669