Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 2016

Retirement Benefits [Abstract]

Summary Of Pension Expense

Pension Benefits	Three Months Ended
	March 31,
(Dollars in thousands)	2016			2015
Service cost	$	2,897		$	2,940
Interest cost		2,361			2,457
Expected return on plan assets		(2,484	)		(2,903	)
Amortization of prior service cost		-			5
Amortization of net (income) loss		2,014			2,251
Net periodic benefit cost	$	4,788		$	4,750

Other Benefits	Three Months Ended
	March 31,
(Dollars in thousands)	2016		2015
Service cost	$	438	$	401
Interest cost		296		263
Amortization of net (income) loss		48		211
Net periodic benefit cost	$	782	$	875