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Statutory Financial Information, Capital Requirements, and Restrictions on Dividends and Transfers of Funds (Tables) | 12 Months Ended
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Dec. 31, 2015
Insurance [Abstract] |
Schedule of Insurance Subsidiaries Statutory Surplus Data |
|  | State of Domicile |  | Unassigned Surplus |  | Statutory Surplus |  | Statutory Net Income
($ in millions) |  |  |  | 2015 |  | 2014 |  | 2015 |  | 2014 |  | 2015 |  | 2014 |  | 2013
SICA |  | New Jersey |  | $ | 366.6 |  |  | 338.8 |  |  | 520.8 |  |  | 493.0 |  |  | 69.6 |  |  | 83.9 |  |  | 53.1 |
Selective Way Insurance Company ("SWIC") |  | New Jersey |  | 223.6 |  |  | 201.3 |  |  | 272.6 |  |  | 250.3 |  |  | 42.3 |  |  | 37.0 |  |  | 27.5 |
Selective Insurance Company of South Carolina ("SICSC") |  | Indiana |  | 96.6 |  |  | 83.9 |  |  | 127.9 |  |  | 115.1 |  |  | 15.9 |  |  | 14.0 |  |  | 8.2 |
Selective Insurance Company of the Southeast ("SICSE") |  | Indiana |  | 70.7 |  |  | 59.3 |  |  | 96.2 |  |  | 84.9 |  |  | 12.1 |  |  | 10.5 |  |  | 6.0 |
Selective Insurance Company of New York ("SICNY") |  | New York |  | 65.3 |  |  | 54.9 |  |  | 93.0 |  |  | 82.6 |  |  | 12.7 |  |  | 10.3 |  |  | 6.9 |
Selective Insurance Company of New England ("SICNE") |  | New Jersey |  | 9.2 |  |  | 5.3 |  |  | 39.4 |  |  | 35.4 |  |  | 5.5 |  |  | 4.4 |  |  | 3.1 |
Selective Auto Insurance Company of New Jersey ("SAICNJ") |  | New Jersey |  | 26.4 |  |  | 18.4 |  |  | 69.2 |  |  | 61.3 |  |  | 10.8 |  |  | 9.1 |  |  | 2.5 |
MUSIC |  | New Jersey |  | 7.0 |  |  | (1.7 | ) |  | 75.5 |  |  | 66.8 |  |  | 9.5 |  |  | 7.3 |  |  | 5.2 |
Selective Casualty Insurance Company ("SCIC") |  | New Jersey |  | 17.8 |  |  | 8.2 |  |  | 92.3 |  |  | 82.7 |  |  | 12.1 |  |  | 9.6 |  |  | 6.6 |
Selective Fire and Casualty Insurance Company ("SFCIC") |  | New Jersey |  | 7.5 |  |  | 3.8 |  |  | 39.4 |  |  | 35.7 |  |  | 5.3 |  |  | 4.2 |  |  | 3.1 |
Total |  |  |  | $ | 890.7 |  |  | 772.2 |  |  | 1,426.3 |  |  | 1,307.8 |  |  | 195.8 |  |  | 190.3 |  |  | 122.2 |
Schedule of Insurance Subsidiaries Dividend Paid To Parent |
Dividends |  |  |  | Twelve Months ended December 31, 2015
($ in millions) |  | State of Domicile |  | Ordinary Dividends Paid
SICA |  | New Jersey |  | $ | 26.0 |
SWIC |  | New Jersey |  | 16.0 |
SICSC |  | Indiana |  | 3.3 |
SICSE |  | Indiana |  | 2.0 |
SICNY |  | New York |  | 2.5 |
SICNE |  | New Jersey |  | 1.5 |
SAICNJ |  | New Jersey |  | 2.5 |
SCIC |  | New Jersey |  | 2.5 |
SFCIC |  | New Jersey |  | 1.5 |
Total |  |  |  | $ | 57.8 |
Schedule of Maximum Payments Insurance Subsidiaries Of Ordinary Dividends |
|  |  |  | 2016
($ in millions) |  | State of Domicile |  | Maximum Ordinary Dividends
SICA |  | New Jersey |  | $ | 61.2 |
SWIC |  | New Jersey |  | 37.0 |
SICSC |  | Indiana |  | 15.9 |
SICSE |  | Indiana |  | 12.1 |
SICNY |  | New York |  | 9.3 |
SICNE |  | New Jersey |  | 5.5 |
SAICNJ |  | New Jersey |  | 10.6 |
MUSIC |  | New Jersey |  | 9.4 |
SCIC |  | New Jersey |  | 12.1 |
SFCIC |  | New Jersey |  | 5.2 |
Total |  |  |  | $ | 178.3 |

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