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SEGMENT INFORMATION (DETAILS 3) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2010
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Sep. 30, 2010
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Jun. 30, 2010
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Mar. 31, 2010
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | $ 846,753 | $ 839,992 | $ 840,014 | $ 788,201 | $ 757,318 | $ 758,873 | $ 735,027 | $ 696,192 | $ 3,314,961 | $ 2,947,410 | $ 2,791,764 |
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Insurance [Member]
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|||||||||||
| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 1,429,687 | 1,206,493 | 1,157,966 | ||||||||
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Insurance [Member] | Property [Member]
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|||||||||||
| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 385,291 | 337,525 | 268,469 | ||||||||
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Insurance [Member] | Marine [Member]
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|||||||||||
| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 152,123 | 145,356 | 139,196 | ||||||||
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Insurance [Member] | Terrorism [Member]
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|||||||||||
| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 35,213 | 32,486 | 34,001 | ||||||||
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Insurance [Member] | Aviation [Member]
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|||||||||||
| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 70,681 | 66,636 | 64,245 | ||||||||
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Insurance [Member] | Credit And Political Risk [Member]
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| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 97,680 | 89,773 | 188,311 | ||||||||
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Insurance [Member] | Professional Lines [Member]
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|||||||||||
| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 536,238 | 444,663 | 381,364 | ||||||||
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Insurance [Member] | Liability [Member]
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|||||||||||
| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 89,555 | 87,481 | 82,380 | ||||||||
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Insurance [Member] | Accident And Health [Member]
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|||||||||||
| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 62,906 | 2,573 | 0 | ||||||||
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Reinsurance [Member]
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|||||||||||
| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 1,885,274 | 1,740,917 | 1,633,798 | ||||||||
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Reinsurance [Member] | Property [Member]
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|||||||||||
| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 356,022 | 323,201 | 311,272 | ||||||||
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Reinsurance [Member] | Professional Lines [Member]
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|||||||||||
| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 281,025 | 285,224 | 266,792 | ||||||||
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Reinsurance [Member] | Liability [Member]
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|||||||||||
| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 230,872 | 232,014 | 227,511 | ||||||||
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Reinsurance [Member] | Other [Member]
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| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 28,028 | 29,082 | 31,851 | ||||||||
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Reinsurance [Member] | Catastrophe [Member]
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| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 456,858 | 454,954 | 451,085 | ||||||||
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Reinsurance [Member] | Credit And Bond [Member]
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| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 263,912 | 217,809 | 179,362 | ||||||||
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Reinsurance [Member] | Motor [Member]
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| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | 202,830 | 127,404 | 99,497 | ||||||||
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Reinsurance [Member] | Engineering [Member]
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| Revenue by Product [Line Items] | |||||||||||
| Net premiums earned | $ 65,727 | $ 71,229 | $ 66,428 | ||||||||