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Effect of Reinsurance on Premiums Written and Earned (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items] |  |  |  |
Net premiums written | $ 146,005 | $ 76,372 | $ 272,109 | $ 149,233
Net premiums earned | 128,877 | $ 66,017 | 256,214 | $ 133,561
American Reliable Insurance Company |  |  |  |
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items] |  |  |  |
Direct business | 64,319 |  | 114,155 |
Reinsurance assumed | 24,685 |  | 48,060 |
Reinsurance ceded | (16,177) |  | (28,732) |
Net premiums written | 72,827 |  | 133,483 |
Direct business | 64,033 |  | 125,026 |
Reinsurance assumed | 23,494 |  | 47,193 |
Reinsurance ceded | (21,609) |  | (42,879) |
Net premiums earned | $ 65,918 |  | $ 129,340 |

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- Definition Amount of earned premiums ceded to other entities. + References Reference 1: 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 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)(2) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486662&loc=d3e27175-158546 Reference 4: 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=34713774&loc=d3e574992-122915 + Details
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