v2.4.0.8
SCHEDULE III - SUPPLEMENTARY INSURANCE INFORMATION (DETAILS) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Supplementary Insurance Information [Line Items]      
Deferred Acquisition Costs $ 456,122 $ 389,248 $ 407,527
Reserve for Losses and Loss Expenses 9,582,140 9,058,731 8,425,045
Unearned Premiums 2,683,849 2,454,692 2,454,462
Net Premiums Earned 3,707,065 3,415,463 3,314,961
Net Investment Income 409,312 380,957 362,430
Losses and Loss Expenses 2,134,195 2,096,028 2,675,052
Amortization of Deferred Acquisition Costs 664,191 627,653 587,469
Other Operating Expenses 575,390 560,981 459,151
Net Premiums Written 3,928,200 3,337,456 3,419,434
Insurance [Member]
      
Supplementary Insurance Information [Line Items]      
Deferred Acquisition Costs 150,109 128,311 142,743
Reserve for Losses and Loss Expenses 4,873,184 4,492,553 4,081,741
Unearned Premiums 1,548,653 1,456,318 1,412,699
Net Premiums Earned 1,722,762 1,558,058 1,429,687
Net Investment Income 0 0 0
Losses and Loss Expenses 1,050,402 953,564 919,319
Amortization of Deferred Acquisition Costs 242,363 226,859 199,583
Other Operating Expenses 347,684 314,834 278,147
Net Premiums Written 1,813,538 1,522,245 1,466,134
Reinsurance [Member]
      
Supplementary Insurance Information [Line Items]      
Deferred Acquisition Costs 306,013 260,937 264,784
Reserve for Losses and Loss Expenses 4,708,956 4,566,178 4,343,304
Unearned Premiums 1,135,196 998,374 1,041,763
Net Premiums Earned 1,984,303 1,857,405 1,885,274
Net Investment Income 0 0 0
Losses and Loss Expenses 1,083,793 1,142,464 1,755,733
Amortization of Deferred Acquisition Costs 421,828 400,794 387,886
Other Operating Expenses 137,450 116,487 103,915
Net Premiums Written 2,114,662 1,815,211 1,953,300
Corporate [Member]
      
Supplementary Insurance Information [Line Items]      
Deferred Acquisition Costs 0 0 0
Reserve for Losses and Loss Expenses 0 0 0
Unearned Premiums 0 0 0
Net Premiums Earned 0 0 0
Net Investment Income 409,312 380,957 362,430
Losses and Loss Expenses 0 0 0
Amortization of Deferred Acquisition Costs 0 0 0
Other Operating Expenses 90,256 129,660 77,089
Net Premiums Written $ 0 $ 0 $ 0