Investments (Details) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended |
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013 |
Investments [Abstract] | ' | ' | ' | ' | ' |
Increase in total investments | ' | ' | $71,400,000 | ' | ' |
Percentage increase in investments (in hundredths) | ' | ' | 32.30% | ' | ' |
Increase in gross premiums written | ' | ' | 70,300,000 | ' | ' |
Percentage increase in gross premiums written (in hundredths) | ' | ' | 68.70% | ' | ' |
Homeowners' Gross Premiums Written | 98,600,000 | 62,600,000 | 172,600,000 | 102,300,000 | ' |
Increase in homeowners gross written transferred to investment accounts | ' | ' | 59,000,000 | ' | ' |
Ratio of available-for-sale securities to total investments (in hundredths) | 97.00% | ' | 97.00% | ' | 97.00% |
Schedule of Available-for-sale Securities [Line Items] | ' | ' | ' | ' | ' |
Debt maturities, held to maturity, at amortized cost | 7,498,000 | ' | 7,498,000 | ' | 7,214,000 |
Bond portfolio reclassified between available-for-sale and held-to-maturity | ' | ' | 0 | 0 | ' |
Debt securities, at market [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at market | 247,947,000 | ' | 247,947,000 | ' | 174,912,000 |
Percent of debt securities at market to total investments (in hundredths) | ' | ' | 84.89% | ' | 79.26% |
Debt securities, at amortized cost [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at amortized cost | 7,498,000 | ' | 7,498,000 | ' | 7,214,000 |
Percent of debt securities at amortized cost to total investments (in hundredths) | ' | ' | 2.57% | ' | 3.27% |
Total debt securities | 255,445,000 | ' | 255,445,000 | ' | 182,126,000 |
Percent of debt securities to total investments (in hundredths) | ' | ' | 87.46% | ' | 82.53% |
Equity securities, at market | 36,630,000 | ' | 36,630,000 | ' | 38,584,000 |
Percentage of equity securities to total investments (in hundredths) | ' | ' | 12.54% | ' | 17.47% |
Total investments | 292,075,000 | ' | 292,075,000 | ' | 220,710,000 |
Total investments (in hundredths) | ' | ' | 100.00% | ' | 100.00% |
Realized gains (losses) [Abstract] | ' | ' | ' | ' | ' |
Total realized gains | 2,106,000 | 1,233,000 | 3,852,000 | 2,555,000 | ' |
Fair Value at Sale of securities with realized gains | 18,714,000 | 11,499,000 | 33,197,000 | 35,179,000 | ' |
Total realized losses | -50,000 | -346,000 | -464,000 | -855,000 | ' |
Fair Value at Sale of securities with realized losses | 3,190,000 | 7,510,000 | 8,227,000 | 24,609,000 | ' |
Net realized gains (losses) on investments | 2,056,000 | 887,000 | 3,388,000 | 1,700,000 | ' |
Fair Value of Investments at Sale | 21,904,000 | 19,009,000 | 41,424,000 | 59,788,000 | ' |
Debt Securities - Available-For-Sale [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Available-For-Sale, Amortized Cost | 244,286,000 | ' | 244,286,000 | ' | 174,511,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 3,894,000 | ' | 3,894,000 | ' | 1,727,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 233,000 | ' | 233,000 | ' | 1,326,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 247,947,000 | ' | 247,947,000 | ' | 174,912,000 |
Debt Securities - Held-To-Maturity [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Held-To-Maturity, Amortized Cost | 7,498,000 | ' | 7,498,000 | ' | 7,214,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Gains | 91,000 | ' | 91,000 | ' | 54,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Losses | 178,000 | ' | 178,000 | ' | 344,000 |
Debt Securities - Held-To-Maturity, Estimated Fair Value | 7,411,000 | ' | 7,411,000 | ' | 6,924,000 |
Equity securities - common stocks, Amortized Cost | 28,487,000 | ' | 28,487,000 | ' | 29,423,000 |
Equity securities - common stocks, Gross Unrealized Gains | 8,407,000 | ' | 8,407,000 | ' | 9,436,000 |
Equity securities - common stocks, Gross Unrealized Loss | 264,000 | ' | 264,000 | ' | 275,000 |
Equity securities - common stocks, Estimated Fair Value | 36,630,000 | ' | 36,630,000 | ' | 38,584,000 |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 497,000 | ' | 497,000 | ' | 1,601,000 |
Debt/Equity securities, Less than 12 months | 299,000 | ' | 299,000 | ' | 1,460,000 |
Debt/Equity securities, 12 months or longer | 198,000 | ' | 198,000 | ' | 141,000 |
Amortized Cost [Abstract] | ' | ' | ' | ' | ' |
Due in one year or less, Amortized Cost | 14,999,000 | ' | 14,999,000 | ' | 5,161,000 |
Due after one through five years, Amortized Cost | 153,641,000 | ' | 153,641,000 | ' | 113,027,000 |
Due after five through ten years, Amortized Cost | 83,118,000 | ' | 83,118,000 | ' | 62,656,000 |
Due after ten years, Amortized Cost | 26,000 | ' | 26,000 | ' | 881,000 |
Total Amortized Cost | 251,784,000 | ' | 251,784,000 | ' | 181,725,000 |
Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' |
Due in one year or less, Estimated Fair Value | 15,060,000 | ' | 15,060,000 | ' | 5,181,000 |
Due after one through five years, Estimated Fair Value | 155,455,000 | ' | 155,455,000 | ' | 113,561,000 |
Due after five through ten years, Estimated Fair Value | 84,810,000 | ' | 84,810,000 | ' | 62,220,000 |
Due after ten years, Estimated Fair Value | 33,000 | ' | 33,000 | ' | 874,000 |
Total Estimated Fair Value | 255,358,000 | ' | 255,358,000 | ' | 181,836,000 |
Investment income [Abstract] | ' | ' | ' | ' | ' |
Interest on debt securities | 1,209,000 | 654,000 | 2,104,000 | 1,369,000 | ' |
Dividends on equity securities | 92,000 | 132,000 | 203,000 | 211,000 | ' |
Interest on cash and cash equivalents | 1,000 | 2,000 | 1,000 | 2,000 | ' |
Total investment income | 1,302,000 | 788,000 | 2,308,000 | 1,582,000 | ' |
Net realized gains | 2,056,000 | 887,000 | 3,388,000 | 1,700,000 | ' |
Proceeds from sales and maturity of marketable securities | 23,100,000 | 20,200,000 | 44,081,000 | 64,354,000 | ' |
Net realized and unrealized investment gains (losses) [Abstract] | ' | ' | ' | ' | ' |
Net realized gains | 2,056,000 | 887,000 | 3,388,000 | 1,700,000 | ' |
Net unrealized gains | ' | ' | 11,804,000 | ' | 9,562,000 |
Diverse Industries Debt Securities [Member] | ' | ' | ' | ' | ' |
Schedule of Available-for-sale Securities [Line Items] | ' | ' | ' | ' | ' |
Percentage of debt securities to total debt portfolio (in hundredths) | ' | ' | 81.00% | ' | 83.00% |
United States Government Bonds [Member] | ' | ' | ' | ' | ' |
Schedule of Available-for-sale Securities [Line Items] | ' | ' | ' | ' | ' |
Percentage of debt securities to total debt portfolio (in hundredths) | ' | ' | 19.00% | ' | 17.00% |
Diverse Industries Equity Securities [Member] | ' | ' | ' | ' | ' |
Schedule of Available-for-sale Securities [Line Items] | ' | ' | ' | ' | ' |
Percentage of equity holdings to total equity portfolio (in hundredths) | ' | ' | 87.00% | ' | 91.00% |
Mutual Funds [Member] | ' | ' | ' | ' | ' |
Schedule of Available-for-sale Securities [Line Items] | ' | ' | ' | ' | ' |
Percentage of equity holdings to total equity portfolio (in hundredths) | ' | ' | 13.00% | ' | 9.00% |
United States Government Obligations and Authorities [Member] | ' | ' | ' | ' | ' |
Schedule of Available-for-sale Securities [Line Items] | ' | ' | ' | ' | ' |
Debt maturities, held to maturity, at amortized cost | 4,257,000 | ' | 4,257,000 | ' | 4,630,000 |
Debt securities, at market [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at market | 43,823,000 | ' | 43,823,000 | ' | 27,209,000 |
Percent of debt securities at market to total investments (in hundredths) | ' | ' | 15.00% | ' | 12.33% |
Debt securities, at amortized cost [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at amortized cost | 4,257,000 | ' | 4,257,000 | ' | 4,630,000 |
Percent of debt securities at amortized cost to total investments (in hundredths) | ' | ' | 1.46% | ' | 2.10% |
Debt Securities - Available-For-Sale [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Available-For-Sale, Amortized Cost | 43,322,000 | ' | 43,322,000 | ' | 27,422,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 591,000 | ' | 591,000 | ' | 186,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 90,000 | ' | 90,000 | ' | 399,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 43,823,000 | ' | 43,823,000 | ' | 27,209,000 |
Debt Securities - Held-To-Maturity [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Held-To-Maturity, Amortized Cost | 4,257,000 | ' | 4,257,000 | ' | 4,630,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Gains | 36,000 | ' | 36,000 | ' | 32,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Losses | 176,000 | ' | 176,000 | ' | 326,000 |
Debt Securities - Held-To-Maturity, Estimated Fair Value | 4,117,000 | ' | 4,117,000 | ' | 4,336,000 |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 90,000 | ' | 90,000 | ' | 399,000 |
Debt/Equity securities, Less than 12 months | 1,000 | ' | 1,000 | ' | 391,000 |
Debt/Equity securities, 12 months or longer | 89,000 | ' | 89,000 | ' | 8,000 |
Obligations of States and Political Subdivisions [Member] | ' | ' | ' | ' | ' |
Debt securities, at market [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at market | 78,100,000 | ' | 78,100,000 | ' | 52,064,000 |
Percent of debt securities at market to total investments (in hundredths) | ' | ' | 26.74% | ' | 23.59% |
Debt Securities - Available-For-Sale [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Available-For-Sale, Amortized Cost | 77,191,000 | ' | 77,191,000 | ' | 51,883,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 937,000 | ' | 937,000 | ' | 303,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 28,000 | ' | 28,000 | ' | 122,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 78,100,000 | ' | 78,100,000 | ' | 52,064,000 |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 28,000 | ' | 28,000 | ' | 122,000 |
Debt/Equity securities, Less than 12 months | 12,000 | ' | 12,000 | ' | 122,000 |
Debt/Equity securities, 12 months or longer | 16,000 | ' | 16,000 | ' | 0 |
Corporate [Member] | ' | ' | ' | ' | ' |
Schedule of Available-for-sale Securities [Line Items] | ' | ' | ' | ' | ' |
Debt maturities, held to maturity, at amortized cost | 2,979,000 | ' | 2,979,000 | ' | 2,475,000 |
Debt securities, at market [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at market | 115,187,000 | ' | 115,187,000 | ' | 91,941,000 |
Percent of debt securities at market to total investments (in hundredths) | ' | ' | 39.44% | ' | 41.66% |
Debt securities, at amortized cost [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at amortized cost | 2,979,000 | ' | 2,979,000 | ' | 2,475,000 |
Percent of debt securities at amortized cost to total investments (in hundredths) | ' | ' | 1.02% | ' | 1.12% |
Debt Securities - Available-For-Sale [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Available-For-Sale, Amortized Cost | 113,018,000 | ' | 113,018,000 | ' | 91,475,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 2,275,000 | ' | 2,275,000 | ' | 1,233,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 106,000 | ' | 106,000 | ' | 767,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 115,187,000 | ' | 115,187,000 | ' | 91,941,000 |
Debt Securities - Held-To-Maturity [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Held-To-Maturity, Amortized Cost | 2,979,000 | ' | 2,979,000 | ' | 2,475,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Gains | 53,000 | ' | 53,000 | ' | 22,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Losses | 1,000 | ' | 1,000 | ' | 17,000 |
Debt Securities - Held-To-Maturity, Estimated Fair Value | 3,031,000 | ' | 3,031,000 | ' | 2,480,000 |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 106,000 | ' | 106,000 | ' | 767,000 |
Debt/Equity securities, Less than 12 months | 23,000 | ' | 23,000 | ' | 761,000 |
Debt/Equity securities, 12 months or longer | 83,000 | ' | 83,000 | ' | 6,000 |
Debt Securities [Member] | ' | ' | ' | ' | ' |
Realized gains (losses) [Abstract] | ' | ' | ' | ' | ' |
Total realized gains | 157,000 | 260,000 | 292,000 | 1,393,000 | ' |
Fair Value at Sale of securities with realized gains | 12,576,000 | 8,134,000 | 22,244,000 | 30,735,000 | ' |
Total realized losses | -28,000 | -91,000 | -98,000 | -500,000 | ' |
Fair Value at Sale of securities with realized losses | 3,007,000 | 6,555,000 | 6,706,000 | 23,031,000 | ' |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 233,000 | ' | 233,000 | ' | 1,326,000 |
Debt/Equity securities, Less than 12 months | 45,000 | ' | 45,000 | ' | 1,312,000 |
Debt/Equity securities, 12 months or longer | 188,000 | ' | 188,000 | ' | 14,000 |
Investment income [Abstract] | ' | ' | ' | ' | ' |
Net realized gains | 129,000 | 169,000 | 194,000 | 893,000 | ' |
Net realized and unrealized investment gains (losses) [Abstract] | ' | ' | ' | ' | ' |
Net realized gains | 129,000 | 169,000 | 194,000 | 893,000 | ' |
Net unrealized gains | ' | ' | 3,661,000 | ' | 401,000 |
Equity Securities [Member] | ' | ' | ' | ' | ' |
Realized gains (losses) [Abstract] | ' | ' | ' | ' | ' |
Total realized gains | 1,949,000 | 973,000 | 3,560,000 | 1,162,000 | ' |
Fair Value at Sale of securities with realized gains | 6,138,000 | 3,365,000 | 10,953,000 | 4,444,000 | ' |
Total realized losses | -22,000 | -255,000 | -366,000 | -355,000 | ' |
Fair Value at Sale of securities with realized losses | 183,000 | 955,000 | 1,521,000 | 1,578,000 | ' |
Investment income [Abstract] | ' | ' | ' | ' | ' |
Net realized gains | 1,927,000 | 718,000 | 3,194,000 | 807,000 | ' |
Net realized and unrealized investment gains (losses) [Abstract] | ' | ' | ' | ' | ' |
Net realized gains | 1,927,000 | 718,000 | 3,194,000 | 807,000 | ' |
Net unrealized gains | ' | ' | 8,143,000 | ' | 9,161,000 |
International [Member] | ' | ' | ' | ' | ' |
Schedule of Available-for-sale Securities [Line Items] | ' | ' | ' | ' | ' |
Debt maturities, held to maturity, at amortized cost | 262,000 | ' | 262,000 | ' | 109,000 |
Debt securities, at market [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at market | 10,837,000 | ' | 10,837,000 | ' | 3,698,000 |
Percent of debt securities at market to total investments (in hundredths) | ' | ' | 3.71% | ' | 1.68% |
Debt securities, at amortized cost [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at amortized cost | 262,000 | ' | 262,000 | ' | 109,000 |
Percent of debt securities at amortized cost to total investments (in hundredths) | ' | ' | 0.09% | ' | 0.05% |
Debt Securities - Available-For-Sale [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Available-For-Sale, Amortized Cost | 10,755,000 | ' | 10,755,000 | ' | 3,731,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 91,000 | ' | 91,000 | ' | 5,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 9,000 | ' | 9,000 | ' | 38,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 10,837,000 | ' | 10,837,000 | ' | 3,698,000 |
Debt Securities - Held-To-Maturity [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Held-To-Maturity, Amortized Cost | 262,000 | ' | 262,000 | ' | 109,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Gains | 2,000 | ' | 2,000 | ' | 0 |
Debt Securities - Held-To-Maturity, Gross Unrealized Losses | 1,000 | ' | 1,000 | ' | 1,000 |
Debt Securities - Held-To-Maturity, Estimated Fair Value | 263,000 | ' | 263,000 | ' | 108,000 |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 9,000 | ' | 9,000 | ' | 38,000 |
Debt/Equity securities, Less than 12 months | 9,000 | ' | 9,000 | ' | 38,000 |
Debt/Equity securities, 12 months or longer | 0 | ' | 0 | ' | 0 |
Common Stock [Member] | ' | ' | ' | ' | ' |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 264,000 | ' | 264,000 | ' | 275,000 |
Debt/Equity securities, Less than 12 months | 254,000 | ' | 254,000 | ' | 148,000 |
Debt/Equity securities, 12 months or longer | 10,000 | ' | 10,000 | ' | 127,000 |
United States Treasury Notes [Member] | Federated National [Member] | ' | ' | ' | ' | ' |
Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' |
Due after one through five years, Estimated Fair Value | 61,984 | ' | 61,984 | ' | 62,490 |
Due after five through ten years, Estimated Fair Value | $2,214,639 | ' | $2,214,639 | ' | $2,193,814 |