XML 49 R87.htm IDEA: XBRL DOCUMENT v2.4.0.6
Reserve of Losses and Loss Expenses (Roll forward of Reserves for Losses and Loss Expenses) (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Insurance Loss Reserves [Abstract]      
Gross reserves for losses and loss expenses, at beginning of year $ 2,830,058,000 $ 2,745,799,000 $ 2,640,973,000
Less: reinsurance recoverable on unpaid loss and loss expenses, at beginning of year 313,739,000 [1] 271,610,000 [1] 224,192,000
Net reserves for losses and loss expenses, at beginning of year 2,516,319,000 2,474,189,000 2,416,781,000
Incurred losses and loss expense for claims occurring in the current year 1,113,733,000 1,025,707,000 1,001,333,000
Incurred losses and loss expenses for claims occurring in the prior years (38,746,000) (43,589,000) (29,428,000)
Total incurred lossesand loss expenses 1,074,987,000 982,118,000 971,905,000
Paid losses and loss expenses for claims occurring in current year 440,786,000 378,650,000 330,006,000
Paid losses and loss expenses for claims occurring in prior years 569,944,000 561,338,000 584,491,000
Total paid losses and loss expenses 1,010,730,000 939,988,000 914,497,000
Acquisition of MUSIC loss and loss expenses reserves 14,858,000 0 0
Net reserves for losses and loss expenses, at end of year 2,595,434,000 2,516,319,000 2,474,189,000
Add: reinsurance recoverable on unpaid loss and loss expenses, at end of year 549,490,000 [1] 313,739,000 [1] 271,610,000 [1]
Gross reserves for losses and loss expenses, at end of year 3,144,924,000 2,830,058,000 2,745,799,000
Increase of net loss and loss expense reserves 79,100,000 42,100,000 57,400,000
Anticipated recoveries for salvage and subrogation claims 67,600,000 55,000,000 58,800,000
Reinsurance recoverable related to the acquisition of MUSIC $ 43,978,000    
[1] 1Includes $44.0 million related to the acquisition of MUSIC.