Employee Benefit Plans

6 Months Ended

Jun. 30, 2017

Retirement Benefits [Abstract]

Employee Benefit Plans

Employee Benefit Plans

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, 2017 and 2016 were as follows (dollars in thousands):

	Pension Benefits						Other Benefits
	Three months ended June 30,						Three months ended June 30,
	2017			2016			2017			2016
Service cost	$	2,819		$	2,652		$	721		$	1,015
Interest cost	1,431			1,076			565			643
Expected return on plan assets	(1,823		)	(1,345		)	—			—
Amortization of prior service cost	95			75			(155		)	—
Amortization of prior actuarial loss	1,082			1,224			457			617
Settlements	256			—			—			—
Net periodic benefit cost	$	3,860		$	3,682		$	1,588		$	2,275

	Pension Benefits						Other Benefits
	Six months ended June 30,						Six months ended June 30,
	2017			2016			2017			2016
Service cost	$	5,399		$	4,958		$	1,442		$	2,031
Interest cost	2,629			2,335			1,130			1,286
Expected return on plan assets	(3,108		)	(2,569		)	—			—
Amortization of prior service cost	169			153			(311		)	—
Amortization of prior actuarial loss	2,163			2,081			914			1,233
Settlements	513			—			—			—
Net periodic benefit cost	$	7,765		$	6,958		$	3,175		$	4,550

The Company has made $5.0 million in pension contributions during the first six months of 2017 and expects to make total pension contributions between $5.0 million and $10.0 million in 2017.