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Significant Accounting Policies (Details Textual) (USD $) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2012
Significant Accounting Policies (Textual) [Abstract] |  |  |  |
Deferred policy acquisition costs | $ 17,377,000 | $ 11,798,000 |  | $ 17,282,000
Significant Accounting Policies (Additional Textual) [Abstract] |  |  |  |
Unsecured amounts due from reinsurers exceeding a fixed percentage of stockholders equity | 3.00% |  |  |
Deferred policy acquisition costs, net, difference percentage |  |  | 13.00% |
Deferred policy acquisition costs, pre-tax charge against earnings |  | 1,600,000 |  |
Maximum amortization period for capitalized cost | 12 months |  |  |
Acquisition-related costs [Member] | Minimum [Member] |  |  |  |
Significant Accounting Policies (Textual) [Abstract] |  |  |  |
Deferred policy acquisition costs |  |  | 11,400,000 |
Acquisition-related costs [Member] | Maximum [Member] |  |  |  |
Significant Accounting Policies (Textual) [Abstract] |  |  |  |
Deferred policy acquisition costs |  |  | 13,000,000 |

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- Definition The unamortized portion as of the balance sheet date of capitalized acquisition costs that are related directly to the successful acquisition of new and renewal insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.7) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 55 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6968122&loc=d3e11446-158418 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 16 -Article 12 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 7 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 18 -Article 12 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6481648&loc=d3e11198-158413 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 60 -Paragraph 28, 29 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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