Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
ASSETS:
Fixed maturities - available for sale, at market value (amortized cost: 2012, $5,060,968; 2011, $4,880,654)	$ 5,326,118	$ 5,107,028
Fixed maturities - available for sale, at fair value	52,217	113,606
Equity securities - available for sale, at market value (cost: 2012, $15; 2011, $15)	13	10
Equity securities - available for sale, at fair value	1,247,445	1,207,053
Short-term investments	640,698	423,663
Other invested assets (cost: 2012, $420,510; 2011, $379,342)	420,510	379,342
Other invested assets, at fair value	1,039,648	817,352
Cash	309,059	348,267
Total investments and cash	9,035,708	8,396,321
Accrued investment income	56,639	55,849
Premiums receivable	990,571	856,375
Reinsurance receivables - unaffiliated	633,893	570,128
Reinsurance receivables - affiliated	2,851,472	2,901,174
Funds held by reinsureds	153,312	176,156
Deferred acquisition costs	90,088	166,806
Prepaid reinsurance premiums	597,498	625,391
Deferred tax asset	208,090	366,490
Income taxes recoverable	16,153	39,014
Other assets	235,593	195,476
TOTAL ASSETS	14,869,017	14,349,180
LIABILITIES:
Reserve for losses and loss adjustment expenses	7,954,633	8,290,619
Unearned premium reserve	1,143,252	1,239,705
Funds held under reinsurance treaties	84,798	123,479
Losses in the course of payment	93,575	11,002
Commission reserves	32,979	40,353
Other net payable to reinsurers	894,866	629,871
5.4% Senior notes due 10/15/2014	249,894	249,858
6.6% Long term notes due 5/1/2067	238,356	238,354
Junior subordinated debt securities payable	329,897	329,897
Accrued interest on debt and borrowings	12,092	4,781
Unsettled securities payable	74,097	8,793
Other liabilities	276,651	241,075
Total liabilities	11,385,090	11,407,787
Commitments and Contingencies (Note 6)
STOCKHOLDER'S EQUITY:
Common stock, par value: $0.01; 3,000 shares authorized; 1,000 shares issued and outstanding (2012 and 2011)
Additional paid-in capital	338,478	333,416
Accumulated other comprehensive income (loss), net of deferred income tax expense (benefit) of $116,254 at 2012 and $94,118 at 2011	215,900	174,790
Retained earnings	2,929,549	2,433,187
Total stockholder's equity	3,483,927	2,941,393
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY	$ 14,869,017	$ 14,349,180