Retirement Plans (Tables)

6 Months Ended

Jun. 30, 2014

Retirement Plans [Abstract]

Net period benefit cost for the pension and postretirement plans

		Three Months Ended				Six Months Ended			Year Ended
		June 30,				June 30,			December 31,
		2014		2013		2014		2013	2013
Components of Net Periodic Benefit Cost		($ in Thousands)
Pension Plan:
Service cost	$	2,975	$	2,975	$	5,950	$	5,950	$	12,078
Interest cost		1,790		1,548		3,580		3,095		6,237
Expected return on plan assets		(4,855)		(4,305)		(9,710)		(8,610)		(17,647)
Amortization of prior service cost		15		17		30		35		72
Amortization of actuarial loss		325		1,073		650		2,145		4,344
Total net periodic benefit cost	$	250	$	1,308	$	500	$	2,615	$	5,084
Postretirement Plan:
Interest cost	$	39	$	40	$	78	$	80	$	142
Amortization of actuarial gain		(9)		―		(18)		―		―
Total net periodic benefit cost	$	30	$	40	$	60	$	80	$	142