Fair Value of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2012

Fair Value Of Financial Instruments [Abstract]

Carrying Amounts And Estimated Fair Values Of Financial Instruments

The following table presents the carrying amounts and estimated fair values of the Company’s financial instruments:

	June 30, 2012				December 31, 2011
(Dollars in thousands)	Carrying Value		Fair Value		Carrying Value		Fair Value
Assets:
Fixed maturity securities	$	11,826,928	$	11,848,850	$	11,312,037	$	11,330,910
Equity securities available for sale	561,785		561,785		443,439		443,439
Arbitrage trading account	419,249		419,249		397,312		397,312
Loans receivable	325,073		316,204		263,187		245,169
Cash and cash equivalents	1,012,220		1,012,220		911,742		911,742
Trading account receivables from brokers and clearing organizations	275,844		275,844		318,240		318,240
Due from broker	—		—		10,875		10,875
Liabilities:
Trading account securities sold but not yet purchased	40,520		40,520		62,514		62,514
Due to broker	38,213		38,213		—		—
Junior subordinated debentures	243,102		244,400		242,997		258,400
Senior notes and other debt	1,865,380		2,040,509		1,500,503		1,587,473