Investments (Details) (USD $) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013 | Dec. 31, 2013 |
Investments [Abstract] | ' | ' | ' | ' | ' |
Increase in total investments | ' | ' | $98,500,000 | ' | ' |
Percentage increase in investments (in hundredths) | ' | ' | 44.60% | ' | ' |
Total investments | 319,202,000 | ' | 319,202,000 | ' | 220,710,000 |
Increase in gross premiums written | ' | ' | 99,500,000 | ' | ' |
Percentage increase in gross premiums written (in hundredths) | ' | ' | 63.60% | ' | ' |
Homeowners' Gross Premiums Written | 83,300,000 | 54,100,000 | 255,900,000 | 156,400,000 | ' |
Increase in homeowners gross written transferred to investment accounts | ' | ' | 59,000,000 | ' | ' |
Ratio of available-for-sale securities to total investments (in hundredths) | 98.00% | ' | 98.00% | ' | 98.00% |
Debt securities at amortized cost [Line Items] | ' | ' | ' | ' | ' |
Debt maturities, held to maturity, at amortized cost | 7,352,000 | ' | 7,352,000 | ' | 7,214,000 |
Bond portfolio reclassified between available-for-sale and held-to-maturity | ' | ' | 0 | 100,000 | ' |
Debt securities, at market [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at market | 275,387,000 | ' | 275,387,000 | ' | 174,912,000 |
Percent of debt securities at market to total investments (in hundredths) | ' | ' | 86.27% | ' | 79.26% |
Debt securities, at amortized cost [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at amortized cost | 7,352,000 | ' | 7,352,000 | ' | 7,214,000 |
Percent of debt securities at amortized cost to total investments (in hundredths) | ' | ' | 2.31% | ' | 3.27% |
Total debt securities | 282,739,000 | ' | 282,739,000 | ' | 182,126,000 |
Percent of debt securities to total investments (in hundredths) | ' | ' | 88.58% | ' | 82.53% |
Equity securities, at market | 36,463,000 | ' | 36,463,000 | ' | 38,584,000 |
Percentage of equity securities to total investments (in hundredths) | ' | ' | 11.42% | ' | 17.47% |
Total investments | 319,202,000 | ' | 319,202,000 | ' | 220,710,000 |
Total investments (in hundredths) | ' | ' | 100.00% | ' | 100.00% |
Realized gains (losses) [Abstract] | ' | ' | ' | ' | ' |
Total realized gains | 694,000 | 1,476,000 | 4,546,000 | 4,032,000 | ' |
Fair Value at Sale of securities with realized gains | 18,055,000 | 11,802,000 | 51,252,000 | 46,981,000 | ' |
Total realized losses | -35,000 | -696,000 | -499,000 | -1,552,000 | ' |
Fair Value at Sale of securities with realized losses | 1,745,000 | 15,933,000 | 9,972,000 | 40,542,000 | ' |
Net realized gains (losses) on investments | 659,000 | 780,000 | 4,047,000 | 2,480,000 | ' |
Fair Value of Investments at Sale | 19,800,000 | 27,735,000 | 61,224,000 | 87,523,000 | ' |
Debt Securities - Available-For-Sale [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Available-For-Sale, Amortized Cost | 272,710,000 | ' | 272,710,000 | ' | 174,511,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 3,230,000 | ' | 3,230,000 | ' | 1,727,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 553,000 | ' | 553,000 | ' | 1,326,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 275,387,000 | ' | 275,387,000 | ' | 174,912,000 |
Debt Securities - Held-To-Maturity [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Held-To-Maturity, Amortized Cost | 7,352,000 | ' | 7,352,000 | ' | 7,214,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Gains | 65,000 | ' | 65,000 | ' | 54,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Losses | 246,000 | ' | 246,000 | ' | 344,000 |
Debt Securities - Held-To-Maturity, Estimated Fair Value | 7,171,000 | ' | 7,171,000 | ' | 6,924,000 |
Equity securities - common stocks, Amortized Cost | 29,220,000 | ' | 29,220,000 | ' | 29,423,000 |
Equity securities - common stocks, Gross Unrealized Gains | 7,886,000 | ' | 7,886,000 | ' | 9,436,000 |
Equity securities - common stocks, Gross Unrealized Loss | 643,000 | ' | 643,000 | ' | 275,000 |
Equity securities - common stocks, Estimated Fair Value | 36,463,000 | ' | 36,463,000 | ' | 38,584,000 |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 1,196,000 | ' | 1,196,000 | ' | 1,601,000 |
Debt/Equity securities, Less than 12 months | 943,000 | ' | 943,000 | ' | 1,460,000 |
Debt/Equity securities, 12 months or longer | 253,000 | ' | 253,000 | ' | 141,000 |
Amortized Cost [Abstract] | ' | ' | ' | ' | ' |
Due in one year or less, Amortized Cost | 13,702,000 | ' | 13,702,000 | ' | 5,161,000 |
Due after one through five years, Amortized Cost | 176,615,000 | ' | 176,615,000 | ' | 113,027,000 |
Due after five through ten years, Amortized Cost | 89,719,000 | ' | 89,719,000 | ' | 62,656,000 |
Due after ten years, Amortized Cost | 26,000 | ' | 26,000 | ' | 881,000 |
Total Amortized Cost | 280,062,000 | ' | 280,062,000 | ' | 181,725,000 |
Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' |
Due in one year or less, Estimated Fair Value | 13,734,000 | ' | 13,734,000 | ' | 5,181,000 |
Due after one through five years, Estimated Fair Value | 177,950,000 | ' | 177,950,000 | ' | 113,561,000 |
Due after five through ten years, Estimated Fair Value | 90,841,000 | ' | 90,841,000 | ' | 62,220,000 |
Due after ten years, Estimated Fair Value | 33,000 | ' | 33,000 | ' | 874,000 |
Total Estimated Fair Value | 282,558,000 | ' | 282,558,000 | ' | 181,836,000 |
Treasury notes maturity date, maturing in one through five years | ' | ' | 31-Dec-16 | ' | 31-Dec-16 |
Treasury notes maturity date, maturing in five through ten years | ' | ' | 31-Dec-22 | ' | 31-Dec-22 |
Investment income [Abstract] | ' | ' | ' | ' | ' |
Interest on debt securities | 1,328,000 | 691,000 | 3,432,000 | 2,059,000 | ' |
Dividends on equity securities | 121,000 | 108,000 | 324,000 | 320,000 | ' |
Interest on cash and cash equivalents | 1,000 | 1,000 | 2,000 | 3,000 | ' |
Total investment income | 1,450,000 | 800,000 | 3,758,000 | 2,382,000 | ' |
Net realized gains | 659,000 | 780,000 | 4,047,000 | 2,480,000 | ' |
Proceeds from sales and maturity of marketable securities | 21,800,000 | 28,700,000 | 65,869,000 | 93,079,000 | ' |
Net realized and unrealized investment gains (losses) [Abstract] | ' | ' | ' | ' | ' |
Net realized gains | 659,000 | 780,000 | 4,047,000 | 2,480,000 | ' |
Net unrealized gains | ' | ' | 9,920,000 | ' | 9,562,000 |
Diverse Industries Debt Securities [Member] | ' | ' | ' | ' | ' |
Debt securities at amortized cost [Line Items] | ' | ' | ' | ' | ' |
Percentage of debt securities to total debt portfolio (in hundredths) | ' | ' | 79.00% | ' | 83.00% |
United States Government Bonds [Member] | ' | ' | ' | ' | ' |
Debt securities at amortized cost [Line Items] | ' | ' | ' | ' | ' |
Percentage of debt securities to total debt portfolio (in hundredths) | ' | ' | 21.00% | ' | 17.00% |
Diverse Industries Equity Securities [Member] | ' | ' | ' | ' | ' |
Debt securities at amortized cost [Line Items] | ' | ' | ' | ' | ' |
Percentage of equity holdings to total equity portfolio (in hundredths) | ' | ' | 87.00% | ' | 91.00% |
Mutual Funds [Member] | ' | ' | ' | ' | ' |
Debt securities at amortized cost [Line Items] | ' | ' | ' | ' | ' |
Percentage of equity holdings to total equity portfolio (in hundredths) | ' | ' | 13.00% | ' | 9.00% |
United States Government Obligations and Authorities [Member] | ' | ' | ' | ' | ' |
Debt securities at amortized cost [Line Items] | ' | ' | ' | ' | ' |
Debt maturities, held to maturity, at amortized cost | 4,433,000 | ' | 4,433,000 | ' | 4,630,000 |
Debt securities, at market [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at market | 55,643,000 | ' | 55,643,000 | ' | 27,209,000 |
Percent of debt securities at market to total investments (in hundredths) | ' | ' | 17.43% | ' | 12.33% |
Debt securities, at amortized cost [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at amortized cost | 4,433,000 | ' | 4,433,000 | ' | 4,630,000 |
Percent of debt securities at amortized cost to total investments (in hundredths) | ' | ' | 1.39% | ' | 2.10% |
Debt Securities - Available-For-Sale [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Available-For-Sale, Amortized Cost | 55,371,000 | ' | 55,371,000 | ' | 27,422,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 469,000 | ' | 469,000 | ' | 186,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 197,000 | ' | 197,000 | ' | 399,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 55,643,000 | ' | 55,643,000 | ' | 27,209,000 |
Debt Securities - Held-To-Maturity [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Held-To-Maturity, Amortized Cost | 4,433,000 | ' | 4,433,000 | ' | 4,630,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Gains | 31,000 | ' | 31,000 | ' | 32,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Losses | 243,000 | ' | 243,000 | ' | 326,000 |
Debt Securities - Held-To-Maturity, Estimated Fair Value | 4,221,000 | ' | 4,221,000 | ' | 4,336,000 |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 197,000 | ' | 197,000 | ' | 399,000 |
Debt/Equity securities, Less than 12 months | 89,000 | ' | 89,000 | ' | 391,000 |
Debt/Equity securities, 12 months or longer | 108,000 | ' | 108,000 | ' | 8,000 |
Obligations of States and Political Subdivisions [Member] | ' | ' | ' | ' | ' |
Debt securities, at market [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at market | 91,641,000 | ' | 91,641,000 | ' | 52,064,000 |
Percent of debt securities at market to total investments (in hundredths) | ' | ' | 28.71% | ' | 23.59% |
Debt Securities - Available-For-Sale [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Available-For-Sale, Amortized Cost | 90,597,000 | ' | 90,597,000 | ' | 51,883,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 1,091,000 | ' | 1,091,000 | ' | 303,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 47,000 | ' | 47,000 | ' | 122,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 91,641,000 | ' | 91,641,000 | ' | 52,064,000 |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 47,000 | ' | 47,000 | ' | 122,000 |
Debt/Equity securities, Less than 12 months | 39,000 | ' | 39,000 | ' | 122,000 |
Debt/Equity securities, 12 months or longer | 8,000 | ' | 8,000 | ' | 0 |
Corporate [Member] | ' | ' | ' | ' | ' |
Debt securities at amortized cost [Line Items] | ' | ' | ' | ' | ' |
Debt maturities, held to maturity, at amortized cost | 2,673,000 | ' | 2,673,000 | ' | 2,475,000 |
Debt securities, at market [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at market | 117,150,000 | ' | 117,150,000 | ' | 91,941,000 |
Percent of debt securities at market to total investments (in hundredths) | ' | ' | 36.70% | ' | 41.66% |
Debt securities, at amortized cost [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at amortized cost | 2,673,000 | ' | 2,673,000 | ' | 2,475,000 |
Percent of debt securities at amortized cost to total investments (in hundredths) | ' | ' | 0.84% | ' | 1.12% |
Debt Securities - Available-For-Sale [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Available-For-Sale, Amortized Cost | 115,833,000 | ' | 115,833,000 | ' | 91,475,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 1,613,000 | ' | 1,613,000 | ' | 1,233,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 296,000 | ' | 296,000 | ' | 767,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 117,150,000 | ' | 117,150,000 | ' | 91,941,000 |
Debt Securities - Held-To-Maturity [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Held-To-Maturity, Amortized Cost | 2,673,000 | ' | 2,673,000 | ' | 2,475,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Gains | 33,000 | ' | 33,000 | ' | 22,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Losses | 2,000 | ' | 2,000 | ' | 17,000 |
Debt Securities - Held-To-Maturity, Estimated Fair Value | 2,704,000 | ' | 2,704,000 | ' | 2,480,000 |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 296,000 | ' | 296,000 | ' | 767,000 |
Debt/Equity securities, Less than 12 months | 188,000 | ' | 188,000 | ' | 761,000 |
Debt/Equity securities, 12 months or longer | 108,000 | ' | 108,000 | ' | 6,000 |
Debt Securities [Member] | ' | ' | ' | ' | ' |
Realized gains (losses) [Abstract] | ' | ' | ' | ' | ' |
Total realized gains | 241,000 | 202,000 | 533,000 | 1,595,000 | ' |
Fair Value at Sale of securities with realized gains | 16,413,000 | 6,183,000 | 38,657,000 | 36,918,000 | ' |
Total realized losses | -20,000 | -421,000 | -118,000 | -922,000 | ' |
Fair Value at Sale of securities with realized losses | 1,627,000 | 14,462,000 | 8,333,000 | 37,493,000 | ' |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 553,000 | ' | 553,000 | ' | 1,326,000 |
Debt/Equity securities, Less than 12 months | 329,000 | ' | 329,000 | ' | 1,312,000 |
Debt/Equity securities, 12 months or longer | 224,000 | ' | 224,000 | ' | 14,000 |
Investment income [Abstract] | ' | ' | ' | ' | ' |
Net realized gains | 221,000 | -219,000 | 415,000 | 673,000 | ' |
Net realized and unrealized investment gains (losses) [Abstract] | ' | ' | ' | ' | ' |
Net realized gains | 221,000 | -219,000 | 415,000 | 673,000 | ' |
Net unrealized gains | ' | ' | 2,677,000 | ' | 401,000 |
Equity Securities [Member] | ' | ' | ' | ' | ' |
Realized gains (losses) [Abstract] | ' | ' | ' | ' | ' |
Total realized gains | 453,000 | 1,274,000 | 4,013,000 | 2,437,000 | ' |
Fair Value at Sale of securities with realized gains | 1,642,000 | 5,619,000 | 12,595,000 | 10,063,000 | ' |
Total realized losses | -15,000 | -275,000 | -381,000 | -630,000 | ' |
Fair Value at Sale of securities with realized losses | 118,000 | 1,471,000 | 1,639,000 | 3,049,000 | ' |
Investment income [Abstract] | ' | ' | ' | ' | ' |
Net realized gains | 438,000 | 999,000 | 3,632,000 | 1,807,000 | ' |
Net realized and unrealized investment gains (losses) [Abstract] | ' | ' | ' | ' | ' |
Net realized gains | 438,000 | 999,000 | 3,632,000 | 1,807,000 | ' |
Net unrealized gains | ' | ' | 7,243,000 | ' | 9,161,000 |
International [Member] | ' | ' | ' | ' | ' |
Debt securities at amortized cost [Line Items] | ' | ' | ' | ' | ' |
Debt maturities, held to maturity, at amortized cost | 246,000 | ' | 246,000 | ' | 109,000 |
Debt securities, at market [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at market | 10,953,000 | ' | 10,953,000 | ' | 3,698,000 |
Percent of debt securities at market to total investments (in hundredths) | ' | ' | 3.43% | ' | 1.68% |
Debt securities, at amortized cost [Abstract] | ' | ' | ' | ' | ' |
Debt securities, at amortized cost | 246,000 | ' | 246,000 | ' | 109,000 |
Percent of debt securities at amortized cost to total investments (in hundredths) | ' | ' | 0.08% | ' | 0.05% |
Debt Securities - Available-For-Sale [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Available-For-Sale, Amortized Cost | 10,909,000 | ' | 10,909,000 | ' | 3,731,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 57,000 | ' | 57,000 | ' | 5,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 13,000 | ' | 13,000 | ' | 38,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 10,953,000 | ' | 10,953,000 | ' | 3,698,000 |
Debt Securities - Held-To-Maturity [Abstract] | ' | ' | ' | ' | ' |
Debt Securities - Held-To-Maturity, Amortized Cost | 246,000 | ' | 246,000 | ' | 109,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Gains | 1,000 | ' | 1,000 | ' | 0 |
Debt Securities - Held-To-Maturity, Gross Unrealized Losses | 1,000 | ' | 1,000 | ' | 1,000 |
Debt Securities - Held-To-Maturity, Estimated Fair Value | 246,000 | ' | 246,000 | ' | 108,000 |
Continuous unrealized loss position [Abstract] | ' | ' | ' | ' | ' |
Debt/Equity securities, Unrealized (Losses) | 13,000 | ' | 13,000 | ' | 38,000 |
Debt/Equity securities, Less than 12 months | 13,000 | ' | 13,000 | ' | 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) | 643,000 | ' | 643,000 | ' | 275,000 |
Debt/Equity securities, Less than 12 months | 614,000 | ' | 614,000 | ' | 148,000 |
Debt/Equity securities, 12 months or longer | 29,000 | ' | 29,000 | ' | 127,000 |
United States Treasury Notes [Member] | Federated National [Member] | ' | ' | ' | ' | ' |
Estimated Fair Value [Abstract] | ' | ' | ' | ' | ' |
Due after one through five years, Estimated Fair Value | 61,727 | ' | 61,727 | ' | 62,490 |
Due after five through ten years, Estimated Fair Value | $2,220,344 | ' | $2,220,344 | ' | $2,193,814 |