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Reinsurance - Additional Information (Detail) (USD $) | 6 Months Ended |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | --- | ---
Jun. 30, 2013 Reinsurers | Dec. 31, 2012 Reinsurers | Jun. 30, 2013 Credit Concentration Risk [Member] | Jun. 30, 2012 Credit Concentration Risk [Member] | Jun. 30, 2013 Credit Concentration Risk [Member] | Jun. 30, 2012 Credit Concentration Risk [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items] |  |  |  |  |  |
Recoveries pertaining to reinsurance contracts |  |  | $ 0 | $ 0 | $ 0 | $ 0
Number of reinsurers | 27 | 31 |  |  |  |
Reinsurance recoverables | 0 | 0 |  |  |  |
Credit risk associated with reinsurance receivables | 0 | 0 |  |  |  |
Recognized benefit on provisions | $ 1,301,000 |  |  |  |  |

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- Definition Concentration of credit risk associated with reinsurance receivables. + References No definition available. + Details
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- Definition Number of reinsurers. + References No definition available. + Details
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- Definition Amount of recovery (expense) related to provision for policy benefits and costs incurred for policies assumed and ceded. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6482485&loc=d3e14764-158437 + Details
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- Definition Amount after valuation allowance recoverable including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 6 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6480758&loc=d3e6824-158387 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),6) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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