Debt (Tables)

12 Months Ended

Dec. 31, 2013

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

The Company’s long-term debt consists of the following (dollars in thousands):

	2013		2012
$400 million 6.20% Subordinated Debentures due 2042	$	400,000	$	400,000
$400 million 6.75% Junior Subordinated Debentures due 2065	318,729		318,727
$400 million 4.70% Senior Notes due 2023	398,533		—
$400 million 5.00% Senior Notes due 2021	398,362		398,141
$400 million 6.45% Senior Notes due 2019	399,602		399,534
$300 million 5.625% Senior Notes due 2017	299,124		298,851
Long-term Debt	$	2,214,350	$	1,815,253