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Effect of Reinsurance on Premiums Written and Earned (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items] |  |  |  |
Net premiums written | $ 122,497 | $ 63,262 | $ 394,606 | $ 212,495
Net premiums earned | 124,707 | $ 68,028 | 380,921 | $ 201,589
American Reliable Insurance Company |  |  |  |
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items] |  |  |  |
Direct business | 65,824 |  | 179,979 |
Reinsurance assumed | 21,525 |  | 69,585 |
Reinsurance ceded | 24,047 |  | 52,779 |
Net premiums written | 63,302 |  | 196,785 |
Direct business | 57,825 |  | 182,851 |
Reinsurance assumed | 22,927 |  | 70,120 |
Reinsurance ceded | 18,620 |  | 61,499 |
Net premiums earned | $ 62,132 |  | $ 191,472 |

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- Definition Amount of written premiums assumed from other entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (b)(2),(c)(2) -URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
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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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