v3.2.0.727
Segment Reporting Disclosures (Company's Segment Disclosures) (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2015
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2015
USD ($)
segment
Jun. 30, 2014
USD ($)
Segment Reporting Information [Line Items]        
Number of reportable ongoing underwriting segments | segment     3  
Gross premium volume $ 1,265,786 $ 1,343,378 $ 2,518,259 $ 2,703,135
Net written premiums 1,034,344 1,084,331 2,069,774 2,223,642
Earned premiums 957,557 965,599 1,901,207 1,914,974
Losses and loss adjustment expenses, current accident year (664,854) (669,910) (1,279,195) (1,319,602)
Losses and loss adjustment expenses, prior accident years 128,660 59,504 296,006 166,893
Underwriting, acquisition and insurance expenses (379,652) (365,987) (720,337) (721,492)
Underwriting profit (loss) 41,711 (10,794) 197,681 40,773
Net investment income 90,586 92,169 183,461 178,884
Net realized investment gains 6,105 7,120 11,676 24,514
Other revenues (insurance) 3,937 6,192 11,126 17,829
Other expenses (insurance) (5,950) (15,344) (15,608) (29,201)
Segment profit (loss) 136,389 79,343 388,336 232,799
Other revenues (non-insurance) 246,420 187,891 499,289 362,425
Other expenses (non-insurance) (236,286) (169,598) (457,629) (337,909)
Amortization of intangible assets (16,949) (13,488) (31,589) (27,487)
Interest expense (29,288) (29,789) (58,600) (59,488)
Income Before Income Taxes $ 100,286 $ 54,359 $ 339,807 $ 170,340
U.S. GAAP combined ratio [1] 96.00% 101.00% 90.00% 98.00%
U.S. Insurance [Member]        
Segment Reporting Information [Line Items]        
Gross premium volume $ 668,853 $ 681,371 $ 1,254,218 $ 1,256,604
Net written premiums 554,638 560,282 1,050,807 1,034,336
Earned premiums 520,446 499,083 1,035,000 982,818
Losses and loss adjustment expenses, current accident year (341,335) (336,514) (658,092) (648,927)
Losses and loss adjustment expenses, prior accident years 68,620 37,883 136,201 81,437
Underwriting, acquisition and insurance expenses (211,856) (198,914) (397,116) (392,443)
Underwriting profit (loss) 35,875 1,538 115,993 22,885
Net investment income 0 0 0 0
Net realized investment gains 0 0 0 0
Other revenues (insurance) 2,203 660 3,605 2,770
Other expenses (insurance) (1,284) (1,464) (2,189) (3,111)
Segment profit (loss) $ 36,794 $ 734 $ 117,409 $ 22,544
U.S. GAAP combined ratio [1] 93.00% 100.00% 89.00% 98.00%
International Insurance [Member]        
Segment Reporting Information [Line Items]        
Gross premium volume $ 338,159 $ 359,120 $ 627,386 $ 653,356
Net written premiums 264,129 270,552 486,837 499,672
Earned premiums 223,941 239,861 429,902 462,008
Losses and loss adjustment expenses, current accident year (168,896) (171,930) (317,740) (335,309)
Losses and loss adjustment expenses, prior accident years 43,373 29,570 120,023 71,867
Underwriting, acquisition and insurance expenses (94,617) (88,442) (173,411) (168,451)
Underwriting profit (loss) 3,801 9,059 58,774 30,115
Net investment income 0 0 0 0
Net realized investment gains 0 0 0 0
Other revenues (insurance) 915 4,357 6,302 11,705
Other expenses (insurance) (1,318) (4,113) (2,722) (7,708)
Segment profit (loss) $ 3,398 $ 9,303 $ 62,354 $ 34,112
U.S. GAAP combined ratio [1] 98.00% 96.00% 86.00% 93.00%
Reinsurance [Member]        
Segment Reporting Information [Line Items]        
Gross premium volume $ 258,745 $ 302,950 $ 636,582 $ 792,911
Net written premiums 215,520 253,085 531,732 689,082
Earned premiums 213,140 226,289 435,894 469,604
Losses and loss adjustment expenses, current accident year (154,623) (161,466) (303,363) (335,366)
Losses and loss adjustment expenses, prior accident years 15,118 13,353 41,505 41,553
Underwriting, acquisition and insurance expenses (73,170) (78,263) (149,723) (160,235)
Underwriting profit (loss) 465 (87) 24,313 15,556
Net investment income 0 0 0 0
Net realized investment gains 0 0 0 0
Other revenues (insurance) 469 1,032 892 3,168
Other expenses (insurance) 0 (1,097) 0 (1,097)
Segment profit (loss) $ 934 $ (152) $ 25,205 $ 17,627
U.S. GAAP combined ratio [1] 100.00% 100.00% 94.00% 97.00%
Other Insurance (Discontinued Lines) [Member]        
Segment Reporting Information [Line Items]        
Gross premium volume $ 29 $ (63) $ 73 $ 264
Net written premiums 57 412 398 552
Earned premiums 30 366 411 544
Losses and loss adjustment expenses, current accident year 0 0 0 0
Losses and loss adjustment expenses, prior accident years 1,549 (21,302) (1,723) (27,964)
Underwriting, acquisition and insurance expenses (9) (368) (87) (363)
Underwriting profit (loss) 1,570 (21,304) (1,399) (27,783)
Net investment income 0 0 0 0
Net realized investment gains 0 0 0 0
Other revenues (insurance) 350 143 327 186
Other expenses (insurance) (3,348) (8,670) (10,697) (17,285)
Segment profit (loss) $ (1,428) $ (29,831) $ (11,769) $ (44,882)
U.S. GAAP combined ratio - not meaniningful [1],[2] NM NM NM NM
Investing [Member]        
Segment Reporting Information [Line Items]        
Gross premium volume $ 0 $ 0 $ 0 $ 0
Net written premiums 0 0 0 0
Earned premiums 0 0 0 0
Losses and loss adjustment expenses, current accident year 0 0 0 0
Losses and loss adjustment expenses, prior accident years 0 0 0 0
Underwriting, acquisition and insurance expenses 0 0 0 0
Underwriting profit (loss) 0 0 0 0
Net investment income 90,586 92,169 183,461 178,884
Net realized investment gains 6,105 7,120 11,676 24,514
Other revenues (insurance) 0 0 0 0
Other expenses (insurance) 0 0 0 0
Segment profit (loss) $ 96,691 $ 99,289 $ 195,137 $ 203,398
[1] The U.S. GAAP combined ratio is a measure of underwriting performance and represents the relationship of incurred losses, loss adjustment expenses and underwriting, acquisition and insurance expenses to earned premiums.
[2] NM – Ratio is not meaningful.