Employee Benefit Plans

9 Months Ended

Sep. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Employee Benefit Plans

Employee Benefit Plans

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

The Company has made $8.0 million in pension contributions during the first nine months of 2016 and expects to make total pension contributions between $8.0 million and $10.0 million in 2016.