Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule Of Defined Benefit Plans Disclosures Text Block

The components of net periodic benefit costs for the three months ended March 31, 2016 and 2015 were as follows (dollars in thousands):

	Pension Benefits						Other Benefits
	Three months ended March 31,						Three months ended March 31,
	2016			2015			2016		2015
Service cost	$	2,306		$	2,030		$	1,016	$	589
Interest cost	1,259			1,243			643		491
Expected return on plan assets	(1,224		)	(1,118		)	—		—
Amortization of prior service cost	78			83			—		—
Amortization of prior actuarial loss	857			439			616		265
Net periodic benefit cost	$	3,276		$	2,677		$	2,275	$	1,345