Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2013

Retirement Plans [Abstract]

Net period benefit cost for the pension and postretirement plans

		2013		2012	2012
Components of Net Periodic Benefit Cost	($ in Thousands)
Pension Plan:
Service cost	$	2,975	$	2,613	$	10,287
Interest cost		1,548		1,613		6,547
Expected return on plan assets		(4,305)		(3,558)		(14,713)
Amortization of prior service cost		17		17		72
Amortization of actuarial loss		1,073		640		2,708
Settlement charge		―		―		408
Total net periodic benefit cost	$	1,308	$	1,325	$	5,309
Postretirement Plan:
Interest cost	$	40	$	47	$	182
Amortization of prior service cost		―		43		170
Total net periodic benefit cost	$	40	$	90	$	352