|
Segments - Net Premiums (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
|
Jun. 30, 2013
|
Jun. 30, 2012
|
Jun. 30, 2013
|
Jun. 30, 2012
|
|
| Segment Reporting Information [Line Items] | ||||
| Net premiums written | $ 497,949 | $ 411,960 | $ 1,187,008 | $ 1,002,793 |
| % of Total Net premiums written | 100.00% | 100.00% | 100.00% | 100.00% |
| Net premiums earned | 513,273 | 437,116 | 1,001,715 | 875,612 |
| % of Total Net premiums earned | 100.00% | 100.00% | 100.00% | 100.00% |
|
Diversified Reinsurance Segment [Member]
|
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| Segment Reporting Information [Line Items] | ||||
| Net premiums written | 134,934 | 143,981 | 402,544 | 432,277 |
| % of Total Net premiums written | 27.00% | 34.90% | 33.90% | 43.10% |
| Net premiums earned | 178,336 | 199,130 | 374,585 | 403,593 |
| % of Total Net premiums earned | 34.80% | 45.60% | 37.40% | 46.10% |
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AmTrust Quota Share Reinsurance Segment [Member]
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| Segment Reporting Information [Line Items] | ||||
| Net premiums written | 290,578 | 195,629 | 635,396 | 421,644 |
| % of Total Net premiums written | 58.40% | 47.50% | 53.50% | 42.10% |
| Net premiums earned | 261,404 | 167,816 | 481,692 | 335,695 |
| % of Total Net premiums earned | 50.90% | 38.30% | 48.10% | 38.30% |
|
NGHC Quota Share Segment [Member]
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| Segment Reporting Information [Line Items] | ||||
| Net premiums written | 72,437 | 72,350 | 149,068 | 148,872 |
| % of Total Net premiums written | 14.60% | 17.60% | 12.60% | 14.80% |
| Net premiums earned | 73,533 | 70,170 | 145,438 | 136,324 |
| % of Total Net premiums earned | 14.30% | 16.10% | 14.50% | 15.60% |
|
Property [Member] | Diversified Reinsurance Segment [Member]
|
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| Segment Reporting Information [Line Items] | ||||
| Net premiums written | 16,556 | 35,855 | 86,078 | 115,961 |
| % of Total Net premiums written | 3.30% | 8.70% | 7.30% | 11.60% |
| Net premiums earned | 27,771 | 55,903 | 75,318 | 114,051 |
| % of Total Net premiums earned | 5.40% | 12.80% | 7.50% | 13.00% |
|
Casualty [Member] | Diversified Reinsurance Segment [Member]
|
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| Segment Reporting Information [Line Items] | ||||
| Net premiums written | 88,793 | 82,762 | 237,216 | 234,701 |
| % of Total Net premiums written | 17.80% | 20.10% | 20.00% | 23.40% |
| Net premiums earned | 116,838 | 111,008 | 233,897 | 214,987 |
| % of Total Net premiums earned | 22.80% | 25.40% | 23.40% | 24.60% |
|
Accident and Health [Member] | Diversified Reinsurance Segment [Member]
|
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| Segment Reporting Information [Line Items] | ||||
| Net premiums written | 7,080 | 5,838 | 22,609 | 25,310 |
| % of Total Net premiums written | 1.40% | 1.40% | 1.80% | 2.50% |
| Net premiums earned | 9,729 | 10,727 | 18,362 | 21,371 |
| % of Total Net premiums earned | 1.90% | 2.50% | 1.80% | 2.40% |
|
International [Member] | Diversified Reinsurance Segment [Member]
|
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| Segment Reporting Information [Line Items] | ||||
| Net premiums written | 22,505 | 19,526 | 56,641 | 56,305 |
| % of Total Net premiums written | 4.50% | 4.70% | 4.80% | 5.60% |
| Net premiums earned | 23,998 | 21,492 | 47,008 | 53,184 |
| % of Total Net premiums earned | 4.70% | 4.90% | 4.70% | 6.10% |
|
Small Commercial Business [Member] | AmTrust Quota Share Reinsurance Segment [Member]
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| Segment Reporting Information [Line Items] | ||||
| Net premiums written | 136,208 | 81,882 | 298,226 | 172,174 |
| % of Total Net premiums written | 27.40% | 19.90% | 25.10% | 17.20% |
| Net premiums earned | 117,566 | 69,907 | 219,823 | 136,799 |
| % of Total Net premiums earned | 22.90% | 16.00% | 22.00% | 15.60% |
|
Specialty Program [Member] | AmTrust Quota Share Reinsurance Segment [Member]
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| Segment Reporting Information [Line Items] | ||||
| Net premiums written | 38,669 | 26,758 | 73,615 | 48,946 |
| % of Total Net premiums written | 7.80% | 6.50% | 6.20% | 4.90% |
| Net premiums earned | 32,115 | 22,948 | 65,461 | 50,586 |
| % of Total Net premiums earned | 6.20% | 5.20% | 6.50% | 5.80% |
|
Specialty Risk and Extended Warranty [Member] | AmTrust Quota Share Reinsurance Segment [Member]
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| Segment Reporting Information [Line Items] | ||||
| Net premiums written | 115,701 | 86,989 | 263,555 | 200,524 |
| % of Total Net premiums written | 23.20% | 21.10% | 22.20% | 20.00% |
| Net premiums earned | 111,723 | 74,961 | 196,408 | 148,310 |
| % of Total Net premiums earned | 21.80% | 17.10% | 19.60% | 16.90% |
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Automobile Liability [Member] | NGHC Quota Share Segment [Member]
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| Segment Reporting Information [Line Items] | ||||
| Net premiums written | 41,585 | 35,401 | 85,924 | 79,269 |
| % of Total Net premiums written | 8.40% | 8.60% | 7.20% | 7.90% |
| Net premiums earned | 42,473 | 36,657 | 84,103 | 74,794 |
| % of Total Net premiums earned | 8.30% | 8.40% | 8.40% | 8.60% |
|
Automobile Physical Damage [Member] | NGHC Quota Share Segment [Member]
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| Segment Reporting Information [Line Items] | ||||
| Net premiums written | 30,852 | 36,949 | 63,144 | 69,603 |
| % of Total Net premiums written | 6.20% | 9.00% | 5.40% | 6.90% |
| Net premiums earned | $ 31,060 | $ 33,513 | $ 61,335 | $ 61,530 |
| % of Total Net premiums earned | 6.00% | 7.70% | 6.10% | 7.00% |