Investments (Details) (USD $) | 3 Months Ended | 12 Months Ended |
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014 |
Investments [Abstract] | | | |
Increase in total investments | $5,600,000 | | |
Percentage increase in investments (in hundredths) | 1.70% | | |
Total investments | 336,381,000 | | 330,763,000 |
Ratio of available-for-sale securities to total investments (in hundredths) | 98.00% | | 98.00% |
Debt securities at amortized cost [Line Items] | | | |
Debt Securities - Held-To-Maturity, Amortized Cost | 7,462,000 | | 7,417,000 |
Bond portfolio reclassified between available-for-sale and held-to-maturity | 0 | | 0 |
Debt securities, at market [Abstract] | | | |
Debt securities, at market | 288,193,000 | | 284,099,000 |
Percent of debt securities at market to total investments (in hundredths) | 85.68% | | 85.90% |
Debt securities, at amortized cost [Abstract] | | | |
Debt securities, at amortized cost | 7,462,000 | | 7,417,000 |
Percent of debt securities at amortized cost to total investments (in hundredths) | 2.22% | | 2.24% |
Total debt securities | 295,655,000 | | 291,516,000 |
Percent of debt securities to total investments (in hundredths) | 87.90% | | 88.14% |
Equity securities, at market | 40,726,000 | | 39,247,000 |
Percentage of equity securities to total investments (in hundredths) | 12.10% | | 11.86% |
Total investments | 336,381,000 | | 330,763,000 |
Total investments (in hundredths) | 100.00% | | 100.00% |
Realized gains (losses) [Abstract] | | | |
Total realized gains | 1,910,000 | 1,745,000 | |
Fair Value at Sale of securities with realized gains | 37,944,000 | 14,483,000 | |
Total realized losses | -206,000 | -414,000 | |
Fair Value at Sale of securities with realized losses | 15,531,000 | 5,037,000 | |
Net realized gains (losses) on investments | 1,704,000 | 1,331,000 | |
Fair Value of Investments at Sale | 53,475,000 | 19,520,000 | |
Debt Securities - Available-For-Sale [Abstract] | | | |
Debt Securities - Available-For-Sale, Amortized Cost | 283,337,000 | | 281,021,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 5,082,000 | | 3,609,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 226,000 | | 531,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 288,193,000 | | 284,099,000 |
Debt Securities - Held-To-Maturity [Abstract] | | | |
Debt Securities - Held-To-Maturity, Amortized Cost | 7,462,000 | | 7,417,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Gains | 109,000 | | 73,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Losses | 132,000 | | 231,000 |
Debt Securities - Held-To-Maturity, Estimated Fair Value | 7,439,000 | | 7,259,000 |
Equity securities - common stocks, Amortized Cost | 31,200,000 | | 29,908,000 |
Equity securities - common stocks, Gross Unrealized Gains | 10,231,000 | | 9,836,000 |
Equity securities - common stocks, Gross Unrealized Loss | 705,000 | | 497,000 |
Equity securities - common stocks, Estimated Fair Value | 40,726,000 | | 39,247,000 |
Continuous unrealized loss position [Abstract] | | | |
Debt/Equity securities, Unrealized (Losses) | 931,000 | | 1,028,000 |
Debt/Equity securities, Less than 12 months | 849,000 | | 863,000 |
Debt/Equity securities, 12 months or longer | 82,000 | | 165,000 |
Amortized Cost [Abstract] | | | |
Due in one year or less, Amortized Cost | 17,357,000 | | 16,777,000 |
Due after one through five years, Amortized Cost | 169,008,000 | | 173,236,000 |
Due after five through ten years, Amortized Cost | 104,439,000 | | 98,404,000 |
Due after ten years, Amortized Cost | 26,000 | | 26,000 |
Total Amortized Cost | 290,830,000 | | 288,443,000 |
Estimated Fair Value [Abstract] | | | |
Due in one year or less, Estimated Fair Value | 17,355,000 | | 16,797,000 |
Due after one through five years, Estimated Fair Value | 170,974,000 | | 174,273,000 |
Due after five through ten years, Estimated Fair Value | 107,274,000 | | 100,259,000 |
Due after ten years, Estimated Fair Value | 33,000 | | 33,000 |
Total Estimated Fair Value | 295,636,000 | | 291,362,000 |
Investment income [Abstract] | | | |
Interest on debt securities | 1,342,000 | 895,000 | |
Dividends on equity securities | 106,000 | 111,000 | |
Interest on cash and cash equivalents | 98,000 | 1,000 | |
Total investment income | 1,546,000 | 1,007,000 | |
Net realized gains | 1,704,000 | 1,331,000 | |
Proceeds from sales and maturity of marketable securities | 56,264,000 | 20,946,000 | |
Net realized and unrealized investment gains [Abstract] | | | |
Net realized gains | 1,704,000 | 1,331,000 | |
Net unrealized gains | 14,382,000 | | 12,417,000 |
Diverse Industries Debt Securities [Member] | | | |
Debt securities at amortized cost [Line Items] | | | |
Percentage of debt securities to total debt portfolio (in hundredths) | 78.00% | | 77.00% |
United States Government Bonds [Member] | | | |
Debt securities at amortized cost [Line Items] | | | |
Percentage of debt securities to total debt portfolio (in hundredths) | 22.00% | | 23.00% |
Diverse Industries Equity Securities [Member] | | | |
Debt securities at amortized cost [Line Items] | | | |
Percentage of equity holdings to total equity portfolio (in hundredths) | 88.00% | | 88.00% |
Mutual Funds [Member] | | | |
Debt securities at amortized cost [Line Items] | | | |
Percentage of equity holdings to total equity portfolio (in hundredths) | 12.00% | | 12.00% |
United States Government Obligations and Authorities [Member] | | | |
Debt securities at amortized cost [Line Items] | | | |
Debt Securities - Held-To-Maturity, Amortized Cost | 4,564,000 | | 4,490,000 |
Debt securities, at market [Abstract] | | | |
Debt securities, at market | 59,549,000 | | 62,323,000 |
Percent of debt securities at market to total investments (in hundredths) | 17.70% | | 18.84% |
Debt securities, at amortized cost [Abstract] | | | |
Debt securities, at amortized cost | 4,564,000 | | 4,490,000 |
Percent of debt securities at amortized cost to total investments (in hundredths) | 1.36% | | 1.36% |
Debt Securities - Available-For-Sale [Abstract] | | | |
Debt Securities - Available-For-Sale, Amortized Cost | 58,136,000 | | 61,376,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 1,466,000 | | 1,022,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 53,000 | | 75,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 59,549,000 | | 62,323,000 |
Debt Securities - Held-To-Maturity [Abstract] | | | |
Debt Securities - Held-To-Maturity, Amortized Cost | 4,564,000 | | 4,490,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Gains | 54,000 | | 41,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Losses | 131,000 | | 225,000 |
Debt Securities - Held-To-Maturity, Estimated Fair Value | 4,487,000 | | 4,306,000 |
Continuous unrealized loss position [Abstract] | | | |
Debt/Equity securities, Unrealized (Losses) | 54,000 | | 75,000 |
Debt/Equity securities, Less than 12 months | 49,000 | | 22,000 |
Debt/Equity securities, 12 months or longer | 5,000 | | 53,000 |
Obligations of States and Political Subdivisions [Member] | | | |
Debt securities, at market [Abstract] | | | |
Debt securities, at market | 92,172,000 | | 91,614,000 |
Percent of debt securities at market to total investments (in hundredths) | 27.40% | | 27.70% |
Debt Securities - Available-For-Sale [Abstract] | | | |
Debt Securities - Available-For-Sale, Amortized Cost | 91,125,000 | | 90,728,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 1,102,000 | | 956,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 55,000 | | 70,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 92,172,000 | | 91,614,000 |
Continuous unrealized loss position [Abstract] | | | |
Debt/Equity securities, Unrealized (Losses) | 55,000 | | 70,000 |
Debt/Equity securities, Less than 12 months | 55,000 | | 66,000 |
Debt/Equity securities, 12 months or longer | 0 | | 4,000 |
Corporate [Member] | | | |
Debt securities at amortized cost [Line Items] | | | |
Debt Securities - Held-To-Maturity, Amortized Cost | 2,701,000 | | 2,681,000 |
Debt securities, at market [Abstract] | | | |
Debt securities, at market | 125,021,000 | | 119,024,000 |
Percent of debt securities at market to total investments (in hundredths) | 37.18% | | 35.99% |
Debt securities, at amortized cost [Abstract] | | | |
Debt securities, at amortized cost | 2,701,000 | | 2,681,000 |
Percent of debt securities at amortized cost to total investments (in hundredths) | 0.80% | | 0.81% |
Debt Securities - Available-For-Sale [Abstract] | | | |
Debt Securities - Available-For-Sale, Amortized Cost | 122,736,000 | | 117,778,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 2,396,000 | | 1,578,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 111,000 | | 332,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 125,021,000 | | 119,024,000 |
Debt Securities - Held-To-Maturity [Abstract] | | | |
Debt Securities - Held-To-Maturity, Amortized Cost | 2,701,000 | | 2,681,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Gains | 52,000 | | 31,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Losses | 1,000 | | 5,000 |
Debt Securities - Held-To-Maturity, Estimated Fair Value | 2,752,000 | | 2,707,000 |
Continuous unrealized loss position [Abstract] | | | |
Debt/Equity securities, Unrealized (Losses) | 111,000 | | 332,000 |
Debt/Equity securities, Less than 12 months | 68,000 | | 260,000 |
Debt/Equity securities, 12 months or longer | 43,000 | | 72,000 |
Debt Securities [Member] | | | |
Realized gains (losses) [Abstract] | | | |
Total realized gains | 515,000 | 135,000 | |
Fair Value at Sale of securities with realized gains | 34,860,000 | 9,668,000 | |
Total realized losses | -103,000 | -70,000 | |
Fair Value at Sale of securities with realized losses | 15,072,000 | 3,699,000 | |
Continuous unrealized loss position [Abstract] | | | |
Debt/Equity securities, Unrealized (Losses) | 225,000 | | 531,000 |
Debt/Equity securities, Less than 12 months | 177,000 | | 402,000 |
Debt/Equity securities, 12 months or longer | 48,000 | | 129,000 |
Investment income [Abstract] | | | |
Net realized gains | 412,000 | 65,000 | |
Net realized and unrealized investment gains [Abstract] | | | |
Net realized gains | 412,000 | 65,000 | |
Net unrealized gains | 4,856,000 | | 3,078,000 |
Equity Securities [Member] | | | |
Realized gains (losses) [Abstract] | | | |
Total realized gains | 1,395,000 | 1,610,000 | |
Fair Value at Sale of securities with realized gains | 3,084,000 | 4,815,000 | |
Total realized losses | -103,000 | -344,000 | |
Fair Value at Sale of securities with realized losses | 459,000 | 1,338,000 | |
Investment income [Abstract] | | | |
Net realized gains | 1,292,000 | 1,266,000 | |
Net realized and unrealized investment gains [Abstract] | | | |
Net realized gains | 1,292,000 | 1,266,000 | |
Net unrealized gains | 9,526,000 | | 9,339,000 |
International [Member] | | | |
Debt securities at amortized cost [Line Items] | | | |
Debt Securities - Held-To-Maturity, Amortized Cost | 197,000 | | 246,000 |
Debt securities, at market [Abstract] | | | |
Debt securities, at market | 11,451,000 | | 11,138,000 |
Percent of debt securities at market to total investments (in hundredths) | 3.40% | | 3.37% |
Debt securities, at amortized cost [Abstract] | | | |
Debt securities, at amortized cost | 197,000 | | 246,000 |
Percent of debt securities at amortized cost to total investments (in hundredths) | 0.06% | | 0.07% |
Debt Securities - Available-For-Sale [Abstract] | | | |
Debt Securities - Available-For-Sale, Amortized Cost | 11,340,000 | | 11,139,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Gains | 118,000 | | 53,000 |
Debt Securities - Available-For-Sale, Gross Unrealized Losses | 7,000 | | 54,000 |
Debt Securities - Available-For-Sale, Estimated Fair Value | 11,451,000 | | 11,138,000 |
Debt Securities - Held-To-Maturity [Abstract] | | | |
Debt Securities - Held-To-Maturity, Amortized Cost | 197,000 | | 246,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Gains | 3,000 | | 1,000 |
Debt Securities - Held-To-Maturity, Gross Unrealized Losses | 0 | | 1,000 |
Debt Securities - Held-To-Maturity, Estimated Fair Value | 200,000 | | 246,000 |
Continuous unrealized loss position [Abstract] | | | |
Debt/Equity securities, Unrealized (Losses) | 5,000 | | 54,000 |
Debt/Equity securities, Less than 12 months | 5,000 | | 54,000 |
Debt/Equity securities, 12 months or longer | 0 | | 0 |
Common Stock [Member] | | | |
Continuous unrealized loss position [Abstract] | | | |
Debt/Equity securities, Unrealized (Losses) | 706,000 | | 497,000 |
Debt/Equity securities, Less than 12 months | 672,000 | | 461,000 |
Debt/Equity securities, 12 months or longer | 34,000 | | 36,000 |
United States Treasury Notes [Member] | Federated National [Member] | | | |
Estimated Fair Value [Abstract] | | | |
Due after one through five years, Estimated Fair Value | 64,639 | | 61,465 |
Due after five through ten years, Estimated Fair Value | 2,055,445 | | 2,208,588 |
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 |
Certificates of Deposit [Member] | Federated National [Member] | | | |
Estimated Fair Value [Abstract] | | | |
Total Estimated Fair Value | $300,000 | | |