Retirement Benefits

9 Months Ended

Sep. 30, 2013

Compensation and Retirement Disclosure [Abstract]

Retirement Benefits

Note 7.               Retirement Benefits

The components of the net periodic pension benefit costs are as follows:

	Three Months Ended						Nine Months Ended
	Sept. 30,			Sept 30,			Sept. 30,			Sept. 30,
	2013			2012			2013			2012
	(Dollars in thousands)
Service cost	$	3,814		$	3,690		$	11,870		$	11,089
Interest cost	6,809			6,688			20,081			20,517
Expected return on plan assets	(13,092		)	(12,127		)	(39,361		)	(34,441		)
Amortization of prior service cost	490			395			1,339			1,348
Amortization of actuarial losses	3,532			2,950			9,417			9,126
Net periodic benefit cost	$	1,553		$	1,596		$	3,346		$	7,639

The components of the net periodic other postretirement benefits costs are as follows:

	Three Months Ended						Nine Months Ended
	Sept. 30,			Sept. 30,			Sept. 30,			Sept. 30,
	2013			2012			2013			2012
	(Dollars in thousands)
Service cost	$	139		$	156		$	531		$	611
Interest cost	343			435			1,260			1,575
Amortization of prior service credit	(674		)	(655		)	(2,013		)	(1,963		)
Amortization of actuarial (gains) losses	(229		)	(138		)	(125		)	4
Net periodic benefit (credit) cost	$	(421	)	$	(202	)	$	(347	)	$	227