EXHIBIT 12.1

Computation of Ratio of Debt to Equity

	Year ended December 31,
Dollars in thousands	2005		2004		2003		2002		2001
Debt	$	620,022,165	$	525,932,946	$	287,454,057	$	250,767,241	$	321,845,000
Equity		166,353,839		170,461,385		162,116,322		161,864,679		175,023,577
Debt to equity		373		309		177		155		184