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Reinsurance (Tables) | 12 Months Ended
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Dec. 31, 2014
Insurance [Abstract] |
Schedule of the Effect of Reinsurance on Premiums Written and Earned | The effect of reinsurance on premiums written and earned in 2014, 2013 and 2012 was as follows:
|  | 2014 Premiums |  | 2013 Premiums |  | 2012 Premiums
|  | Written |  | Earned |  | Written |  | Earned |  | Written |  | Earned
|  | (in thousands)
Gross |  | $ | 393,819 |  |  | $ | 389,540 |  |  | $ | 372,177 |  |  | $ | 348,408 |  |  | $ | 328,823 |  |  | $ | 306,994 |
Ceded |  |  | (13,793 | ) |  |  | (13,793 | ) |  |  | (18,425 | ) |  |  | (18,425 | ) |  |  | (16,305 | ) |  |  | (16,305 | )
Net premiums |  | $ | 380,026 |  |  | $ | 375,747 |  |  | $ | 353,752 |  |  | $ | 329,983 |  |  | $ | 312,518 |  |  | $ | 290,689 |
Schedule of the Amounts Recoverable from Reinsurers | The amounts recoverable from reinsurers consist of the following:
|  | December 31,
|  | 2014 |  | 2013
|  | (in thousands)
Unpaid losses recoverable: |  |  |  |  |  |  |  |
Case basis |  | $ | 34,196 |  |  | $ | 31,850 |
Incurred but not reported |  |  | 25,138 |  |  |  | 16,849 |
Paid losses recoverable |  |  | 424 |  |  |  | 497 |
Experience-rated commissions recoverable |  |  | 26,130 |  |  |  | 26,130 |
Total |  | $ | 85,888 |  |  | $ | 75,326 |
Schedule of Unsecured Reinsurance Recoverables from Reinsurers | The A.M. Best Company rating for the reinsurer is shown parenthetically.
Hannover Reinsurance (Ireland) Limited (A+) |  | $ | 27,387 |
Odyssey America Reinsurance Corporation (A) |  |  | 13,523 |
Minnesota Workers’ Compensation Reinsurance Association (NR) |  |  | 8,518 |
Tokio Millenium Reinsurance Limited (A++) |  |  | 6,410 |
Clearwater Insurance Company (bbb) |  |  | 6,229 |
Other reinsurers |  |  | 23,821 |
Total reinsurance recoverables |  |  | 85,888 |
Letters of credit and funds held |  |  | (47,833 | )
Total unsecured reinsurance recoverables |  | $ | 38,055 |

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- Definition Reinsurance reserves recoverable. + References No definition available. + Details
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