Investments (Details) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Investments Including Short Term And Cash And Cash Equivalents [Abstract]
Fixed maturity securities	$ 868,345,000		$ 832,952,000
Fixed maturity securities percent	84.30%		83.90%
Equity securities	49,845,000		47,259,000
Equity securities percent	4.80%		4.80%
Mortgage loans	659,000		671,000
Mortgage loans percent	0.10%		0.10%
Policy loans	50,288,000		48,868,000
Policy loans percent	4.90%		4.80%
Real estate and other long-term investments	8,447,000		8,485,000
Real estate and other long-term investments percent	0.80%		0.90%
Cash and cash equivalents	52,307,000	42,608,000	54,593,000	56,299,000
Cash and cash equivalents percent	5.10%		5.50%
Total cash, cash equivalents and investments	1,029,891,000		992,828,000
Total cash, cash equivalents and investments percent	100.00%		100.00%
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Debt Securities, Amortized Cost Basis	621,480,000		595,944,000
Available-for-sale Equity Securities, Amortized Cost Basis	48,133,000		45,883,000
Available-for-sale Securities, Fair Value	694,604,000		652,515,000
Available-for-sale Securities, Debt Securities, Amortized Cost Basis, Total	621,480,000		595,944,000
Available-for-sale Debt Securities, Gross Unrealized Gains, Total	29,993,000		22,390,000
Available-for-sale Debt Securities, Gross Unrealized Losses, Total	6,714,000		13,078,000
Available-for-sale Debt Securities, Fair Value	644,759,000		605,256,000
Held-to-maturity Securities, Debt Securities, Net Carrying Amount	223,586,000		227,696,000
Held-to-maturity Securities, Unrecognized Holding Gain	5,077,000		2,601,000
Held-to-maturity Securities, Unrecognized Holding Loss	3,576,000		6,764,000
Held-to-maturity Securities, Fair Value	225,087,000		223,533,000
Total Fixed Maturity Securities, Amortized Cost	845,066,000
Total Fixed Maturity Securities, Fair Value	869,846,000
Unrealized Continuous Losses on Investments [Abstract]
Number of Available-for-sale Securities In Continuous Loss Position Aggregate	209		262
Debt Securities In Continuous Loss Less Than 12 Months Fair Value	247,836,000		341,533,000
Debt Securities Continuous Loss Position Less Than 12 Months Unrealized Losses	8,652,000		16,737,000
Number of Debt Securities In Continuous Loss Less Than 12 Months	273		366
Debt Securities In Continuous Loss Position 12 Months Or Longer, Fair Value	36,298,000		32,938,000
Debt Securities In Continuous Loss Position 12 Months Or Longer, Unrealized Losses	1,638,000		3,105,000
Number of Debt Securities In Continuous Loss Position 12 Months or Longer	45		36
Debt Securities In Continuous Loss Position, Aggregate Fair Value	284,134,000		374,471,000
Debt Securities In Continuous Loss Position, Aggregate Unrealized Losses	10,290,000		19,842,000
Number of Debt Securities In Continuous Loss Position, Aggregate	318		402
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]
Proceeds from Sale of Available-for-sale Securities, Fixed Maturities	0	58,000
Proceeds from Sale of Available-for-sale Securities, Equity	0	0
Schedule of Fixed Maturities [Abstract]
Available-for-sale Securities, Debt Maturities, Due in One Year or Less, Amortized Cost Basis	15,507,000
Available-for-sale Securities, Debt Maturities, Due in One Year or Less, Fair Value	15,818,000
Available-for-sale Securities, Debt Maturities, Due After One Year Through Five Years, Amortized Cost Basis	117,719,000
Available-for-sale Securities, Debt Maturities, Due After One Year Through Five Years, Fair Value	125,050,000
Available-for-sale Securities, Debt Maturities, Due After Five Years Through Ten Years, Amortized Cost Basis	104,920,000
Available-for-sale Securities, Debt Maturities, Due After Five Years Through Ten Years, Fair Value	108,876,000
Available-for-sale Securities, Debt Maturities, Due After Ten Years, Amortized Cost Basis	383,334,000
Available-for-sale Securities, Debt Maturities, Due After Ten Years, Fair Value	395,015,000
Held-to-maturity Securities, Debt Maturities, Due in One Year or Less, Amortized Cost Basis	10,453,000
Held-to-maturity Securities, Debt Maturities, Due in One Year or Less, Fair Value	10,515,000
Held-to-maturity Securities, Debt Maturities, Due After One Year Through Five Years, Amortized Cost Basis	31,897,000
Held-to-maturity Securities, Debt Maturities, Due After One Year Through Five Years, Fair Value	32,581,000
Held-to-maturity Securities, Debt Maturities, Due After Five Years Through Ten Years, Amortized Cost Basis	43,214,000
Held-to-maturity Securities, Debt Maturities, Due After Five Years Through Ten Years, Fair Value	44,633,000
Held-to-maturity Securities, Debt Maturities, Due After Ten Years, Amortized Cost Basis	138,022,000
Held-to-maturity Securities, Debt Maturities, Due After Ten Years, Fair Value	137,358,000
Sale of bonds, number of securities sold at a loss	0	0
Sale of bonds, number of held-to-maturity bonds sold	0	0
US Treasury Securities [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Debt Securities, Amortized Cost Basis	10,101,000		10,115,000
Available-for-sale Securities, Gross Unrealized Gains	2,539,000		2,348,000
Available-for-sale Securities, Gross Unrealized Losses	0		0
Available-for-sale Securities, Fair Value	12,640,000		12,463,000
US Government Agencies Debt Securities [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Debt Securities, Amortized Cost Basis	43,076,000		53,587,000
Available-for-sale Securities, Gross Unrealized Gains	1,718,000		1,209,000
Available-for-sale Securities, Gross Unrealized Losses	30,000		228,000
Available-for-sale Securities, Fair Value	44,764,000		54,568,000
Held-to-maturity Securities, Debt Securities, Net Carrying Amount	5,846,000		8,877,000
Held-to-maturity Securities, Unrecognized Holding Gain	249,000		197,000
Held-to-maturity Securities, Unrecognized Holding Loss	0		3,000
Held-to-maturity Securities, Fair Value	6,095,000		9,071,000
Unrealized Continuous Losses on Investments [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,285,000		14,032,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	9,000		228,000
Number of Available-for-sale Securities In Continuous Loss Position Less Than 12 Months	6		12
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	830,000		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	21,000		0
Number of Available-for-sale Securities In Continuous Loss Position For 12 months or Greater	1		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,115,000		14,032,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	30,000		228,000
Number of Available-for-sale Securities In Continuous Loss Position Aggregate	7		12
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value			2,997,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses			3,000
Number of Held-to-maturity Securities In Continuous Loss Position Less Than 12 Months			1
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value			0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses			0
Number of Held-to-maturity Securities In Continuous Loss Position 12 Months or Greater			0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value			2,997,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses			3,000
Number of Held-to-maturity Securities In Continuous Loss Position Aggregate			1
US States and Political Subdivisions Debt Securities [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Debt Securities, Amortized Cost Basis	355,633,000		341,673,000
Available-for-sale Securities, Gross Unrealized Gains	10,529,000		6,242,000
Available-for-sale Securities, Gross Unrealized Losses	6,242,000		11,449,000
Available-for-sale Securities, Fair Value	359,920,000		336,466,000
Held-to-maturity Securities, Debt Securities, Net Carrying Amount	183,868,000		181,246,000
Held-to-maturity Securities, Unrecognized Holding Gain	3,975,000		1,633,000
Held-to-maturity Securities, Unrecognized Holding Loss	3,400,000		6,412,000
Held-to-maturity Securities, Fair Value	184,443,000		176,467,000
Unrealized Continuous Losses on Investments [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	128,340,000		183,280,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	5,149,000		9,872,000
Number of Available-for-sale Securities In Continuous Loss Position Less Than 12 Months	137		203
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	21,095,000		15,673,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	1,093,000		1,577,000
Number of Available-for-sale Securities In Continuous Loss Position For 12 months or Greater	23		16
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	149,435,000		198,953,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	6,242,000		11,449,000
Number of Available-for-sale Securities In Continuous Loss Position Aggregate	160		219
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	74,114,000		100,153,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	3,031,000		5,236,000
Number of Held-to-maturity Securities In Continuous Loss Position Less Than 12 Months	87		118
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	11,710,000		14,797,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	369,000		1,176,000
Number of Held-to-maturity Securities In Continuous Loss Position 12 Months or Greater	18		17
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	85,824,000		114,950,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses	3,400,000		6,412,000
Number of Held-to-maturity Securities In Continuous Loss Position Aggregate	105		135
Foreign Government Debt Securities [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Debt Securities, Amortized Cost Basis	104,000		104,000
Available-for-sale Securities, Gross Unrealized Gains	27,000		23,000
Available-for-sale Securities, Gross Unrealized Losses	0		0
Available-for-sale Securities, Fair Value	131,000		127,000
Corporate Debt Securities [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Debt Securities, Amortized Cost Basis	208,740,000		186,671,000
Available-for-sale Securities, Gross Unrealized Gains	14,883,000		12,289,000
Available-for-sale Securities, Gross Unrealized Losses	440,000		1,399,000
Available-for-sale Securities, Fair Value	223,183,000		197,561,000
Held-to-maturity Securities, Debt Securities, Net Carrying Amount	33,872,000		37,573,000
Held-to-maturity Securities, Unrecognized Holding Gain	853,000		771,000
Held-to-maturity Securities, Unrecognized Holding Loss	176,000		349,000
Held-to-maturity Securities, Fair Value	34,549,000		37,995,000
Unrealized Continuous Losses on Investments [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	38,641,000		35,789,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	286,000		1,048,000
Number of Available-for-sale Securities In Continuous Loss Position Less Than 12 Months	34		25
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,623,000		2,426,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	154,000		351,000
Number of Available-for-sale Securities In Continuous Loss Position For 12 months or Greater	2		2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	41,264,000		38,215,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	440,000		1,399,000
Number of Available-for-sale Securities In Continuous Loss Position Aggregate	36		27
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	5,395,000		5,225,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	176,000		349,000
Number of Held-to-maturity Securities In Continuous Loss Position Less Than 12 Months	4		4
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0		0
Number of Held-to-maturity Securities In Continuous Loss Position 12 Months or Greater	0		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	5,395,000		5,225,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses	176,000		349,000
Number of Held-to-maturity Securities In Continuous Loss Position Aggregate	4		4
Collateralized Mortgage Backed Securities [Member]
Schedule of Fixed Maturities And Equity Securities [Line Items]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	3,800,000
Commercial Mortgage Backed Securities [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Debt Securities, Amortized Cost Basis	432,000		300,000
Available-for-sale Securities, Gross Unrealized Gains	10,000		9,000
Available-for-sale Securities, Gross Unrealized Losses	0		0
Available-for-sale Securities, Fair Value	442,000		309,000
Residential Mortgage Backed Securities [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Debt Securities, Amortized Cost Basis	3,394,000		3,494,000
Available-for-sale Securities, Gross Unrealized Gains	287,000		270,000
Available-for-sale Securities, Gross Unrealized Losses	2,000		2,000
Available-for-sale Securities, Fair Value	3,679,000		3,762,000
Unrealized Continuous Losses on Investments [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	61,000		57,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	1,000		1,000
Number of Available-for-sale Securities In Continuous Loss Position Less Than 12 Months	5		3
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	40,000		42,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	1,000		1,000
Number of Available-for-sale Securities In Continuous Loss Position For 12 months or Greater	1		1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	101,000		99,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	2,000		2,000
Number of Available-for-sale Securities In Continuous Loss Position Aggregate	6		4
Debt Securities [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Total Fixed Maturity Securities, Amortized Cost	845,066,000		823,640,000
Total Fixed Maturity Securities, Gross Unrealized Gains	35,070,000		24,991,000
Total Fixed Maturity Securities, Gross Unrealized Losses	10,290,000		19,842,000
Total Fixed Maturity Securities, Fair Value	869,846,000		828,789,000
Unrealized Continuous Losses on Investments [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	168,327,000		233,158,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	5,445,000		11,149,000
Number of Available-for-sale Securities In Continuous Loss Position Less Than 12 Months	182		243
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	24,588,000		18,141,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	1,269,000		1,929,000
Number of Available-for-sale Securities In Continuous Loss Position For 12 months or Greater	27		19
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	192,915,000		251,299,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	6,714,000		13,078,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	79,509,000		108,375,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	3,207,000		5,588,000
Number of Held-to-maturity Securities In Continuous Loss Position Less Than 12 Months	91		123
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	11,710,000		14,797,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	369,000		1,176,000
Number of Held-to-maturity Securities In Continuous Loss Position 12 Months or Greater	18		17
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value	91,219,000		123,172,000
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Losses	3,576,000		6,764,000
Number of Held-to-maturity Securities In Continuous Loss Position Aggregate	109		140
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]
Available-for-sale Securities, Gross Realized Gains	0	1,000
Available-for-sale Securities, Gross Realized Losses	0	0
Stock Mutual Funds [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Equity Securities, Amortized Cost Basis	10,463,000		10,463,000
Available-for-sale Securities, Gross Unrealized Gains	1,737,000		1,506,000
Available-for-sale Securities, Gross Unrealized Losses	0		0
Available-for-sale Securities, Fair Value	12,200,000		11,969,000
Bond Mutual Funds [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Equity Securities, Amortized Cost Basis	35,080,000		35,080,000
Available-for-sale Securities, Gross Unrealized Gains	29,000		0
Available-for-sale Securities, Gross Unrealized Losses	318,000		417,000
Available-for-sale Securities, Fair Value	34,791,000		34,663,000
Unrealized Continuous Losses on Investments [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	27,682,000		34,663,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	318,000		417,000
Number of Available-for-sale Securities In Continuous Loss Position Less Than 12 Months	3		7
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0		0
Number of Available-for-sale Securities In Continuous Loss Position For 12 months or Greater	0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	27,682,000		34,663,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	318,000		417,000
Number of Available-for-sale Securities In Continuous Loss Position Aggregate	3		7
Common Stock [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Equity Securities, Amortized Cost Basis	810,000		17,000
Available-for-sale Securities, Gross Unrealized Gains	10,000		0
Available-for-sale Securities, Gross Unrealized Losses	7,000		5,000
Available-for-sale Securities, Fair Value	813,000		12,000
Unrealized Continuous Losses on Investments [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	136,000		12,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	3,000		5,000
Number of Available-for-sale Securities In Continuous Loss Position Less Than 12 Months	1		1
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	13,000		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	4,000		0
Number of Available-for-sale Securities In Continuous Loss Position For 12 months or Greater	1		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	149,000		12,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	7,000		5,000
Number of Available-for-sale Securities In Continuous Loss Position Aggregate	2		1
Preferred Stock [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Equity Securities, Amortized Cost Basis	1,780,000		323,000
Available-for-sale Securities, Gross Unrealized Gains	269,000		292,000
Available-for-sale Securities, Gross Unrealized Losses	8,000		0
Available-for-sale Securities, Fair Value	2,041,000		615,000
Unrealized Continuous Losses on Investments [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	338,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	8,000
Number of Available-for-sale Securities In Continuous Loss Position Less Than 12 Months	8
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0
Number of Available-for-sale Securities In Continuous Loss Position For 12 months or Greater	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	338,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	8,000
Number of Available-for-sale Securities In Continuous Loss Position Aggregate	8
Equity Securities [Member]
Unrealized Gain (Loss) on Investments [Abstract]
Available-for-sale Equity Securities, Amortized Cost Basis	48,133,000		45,883,000
Available-for-sale Securities, Gross Unrealized Gains	2,045,000		1,798,000
Available-for-sale Securities, Gross Unrealized Losses	333,000		422,000
Available-for-sale Securities, Fair Value	49,845,000		47,259,000
Unrealized Continuous Losses on Investments [Abstract]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	28,156,000		34,675,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	329,000		422,000
Number of Available-for-sale Securities In Continuous Loss Position Less Than 12 Months	12		8
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	13,000		0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	4,000		0
Number of Available-for-sale Securities In Continuous Loss Position For 12 months or Greater	1		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	28,169,000		34,675,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	333,000		422,000
Number of Available-for-sale Securities In Continuous Loss Position Aggregate	13		8
Available-for-sale Securities, Gross Realized Gain (Loss) [Abstract]
Available-for-sale Securities, Gross Realized Gains	0	0
Available-for-sale Securities, Gross Realized Losses	$ 0	$ 0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Fixed Maturities [Abstract]
Percent of residential mortgage backed to securities	89.50%