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	Dec. 31, 2016		Dec. 31, 2016
Treasury notes maturity date, maturing in five through ten years	Dec. 31, 2022		Dec. 31, 2022
Certificates of Deposit [Member] | Federated National [Member]
Estimated Fair Value [Abstract]
Total Estimated Fair Value	$ 300,000