Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2011

Defined Benefit Pension Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule Of Defined Benefit Plans

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
	2010			2011			2010			2011
	(Dollars in thousands)						(Dollars in thousands)
Service cost	$	164		$	164		$	492		$	492
Interest cost		2,446			2,446			7,338			7,338
Expected return on plan assets		(2,138	)		(2,138	)		(6,414	)		(6,414	)
Amortization of prior service cost		13			13			39			39
Net Cost	$	485		$	485		$	1,455		$	1,455

Other Postretirement Benefit Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Schedule Of Defined Benefit Plans

	For the Three Months  Ended September 30,						For the Nine Months Ended September 30,
	2010			2011			2010			2011
	(Dollars in thousands)						(Dollars in thousands)
Service cost	$	41		$	41		$	123		$	123
Interest cost		440			440			1,320			1,320
Amortization of prior service benefit		(48	)		(48	)		(144	)		(144	)
Net Cost	$	433		$	433		$	1,299		$	1,299