Contingencies (Tables)

12 Months Ended

Dec. 31, 2011

Contingencies [Abstract]

Estimated Cost To Replace Annuities For Contingent Liability

	At December 31,
(Dollars in thousands)	2011		2010
	$	143,447	$	150,560

Estimated Cost To Replace Annuities For Contingent Liability Prior To IPO

	At December 31,
(Dollars in thousands)	2011		2010
	$	27,634	$	26,542