Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
ASSETS:
Fixed maturities - available for sale, at market value (amortized cost: 2013, $5,166,600; 2012, $5,289,619)	$ 5,201,921	$ 5,531,410
Fixed maturities - available for sale, at fair value	19,388	41,470
Equity securities - available for sale, at market value (cost: 2013, $15; 2012, $15)	13	13
Equity securities - available for sale, at fair value	1,298,940	1,199,848
Short-term investments	757,162	465,550
Other invested assets (cost: 2013, $385,776; 2012, $420,744)	385,776	420,744
Other invested assets, at fair value	1,515,052	1,068,711
Cash	316,807	347,720
Total investments and cash	9,495,059	9,075,466
Accrued investment income	50,306	54,914
Premiums receivable	1,173,780	1,001,267
Reinsurance receivables - unaffiliated	530,158	650,261
Reinsurance receivables - affiliated	3,062,884	2,976,992
Funds held by reinsureds	175,526	161,694
Deferred acquisition costs	112,024	97,522
Prepaid reinsurance premiums	673,753	557,460
Deferred tax asset	(51,289)	214,175
Income taxes recoverable	27,340	61,244
Other assets	247,505	236,955
TOTAL ASSETS	15,548,335	15,087,950
LIABILITIES:
Reserve for losses and loss adjustment expenses	7,653,229	8,143,055
Unearned premium reserve	1,317,147	1,093,822
Funds held under reinsurance treaties	92,514	90,079
Losses in the course of payment	350,820	179,774
Commission reserves	47,226	39,324
Other net payable to reinsurers	1,026,292	900,794
5.4% Senior notes due 10/15/2014	249,958	249,907
6.6% Long term notes due 5/1/2067	238,361	238,357
Junior subordinated debt securities payable		329,897
Accrued interest on debt and borrowings	4,781	4,781
Unsettled securities payable	53,772	48,830
Other liabilities	272,468	290,724
Total liabilities	11,357,857	11,609,344
Commitments and Contingencies (Note 16)
STOCKHOLDER'S EQUITY:
Common stock, par value: $0.01; 3,000 shares authorized; 1,000 shares issued and outstanding (2013 and 2012)
Additional paid-in capital	351,051	340,223
Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit) of $47,195 at 2013 and $99,544 at 2012	87,648	184,867
Retained earnings	3,751,779	2,953,516
Total stockholder's equity	4,190,478	3,478,606
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY	$ 15,548,335	$ 15,087,950