Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule Of Defined Benefit Plans Disclosures Text Block

The components of net periodic benefit costs for the three and nine months ended September 30, 2016 and 2015 were as follows (dollars in thousands):

	Pension Benefits						Other Benefits
	Three months ended September 30,						Three months ended September 30,
	2016			2015			2016			2015
Service cost	$	2,479		$	2,307		$	131		$	1,868
Interest cost	1,168			1,262			408			947
Expected return on plan assets	(1,285		)	(1,224		)	—			—
Amortization of prior service cost	76			82			(467		)	—
Amortization of prior actuarial loss	1,040			636			137			1,319
Net periodic benefit cost	$	3,478		$	3,063		$	209		$	4,134

	Pension Benefits						Other Benefits
	Nine months ended September 30,						Nine months ended September 30,
	2016			2015			2016			2015
Service cost	$	7,437		$	6,923		$	2,162		$	3,046
Interest cost	3,503			3,788			1,694			1,929
Expected return on plan assets	(3,854		)	(3,673		)	—			—
Amortization of prior service cost	229			245			(467		)	—
Amortization of prior actuarial loss	3,121			1,908			1,370			1,849
Net periodic benefit cost	$	10,436		$	9,191		$	4,759		$	6,824