v2.4.0.8

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] |  |  |  |
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%
AmTrust Quota Share Reinsurance Segment [Member] |  |  |  |
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] |  |  |  |
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] |  |  |  |
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] |  |  |  |
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] |  |  |  |
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] |  |  |  |
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] |  |  |  |
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] |  |  |  |
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] |  |  |  |
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%
Automobile Liability [Member] | NGHC Quota Share Segment [Member] |  |  |  |
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] |  |  |  |
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%

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- Definition Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums earned. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 17 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 2 -Subparagraph (SX 210.12-17) -URI http://asc.fasb.org/extlink&oid=6588446&loc=d3e574992-122915 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.1) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 1 -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(c)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Amount, after premiums ceded to other entities and premiums assumed by the entity, of premiums written. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 17 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (b),(c) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
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