Investments Reconciliation, Investments by Category (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	$ 350,063	$ 274,651
Available-for-sale Equity Securities, Amortized Cost Basis	22,278	13,825
Available-for-sale Securities, Amortized Cost Basis	375,090	291,510
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	8,230	3,513
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	1,693	3,363
Available-for-sale Securities, Debt Securities	352,630	273,024
Available-for-sale Securities, Equity Securities	25,987	15,602
Other Long-term Investments	3,010us-gaap_OtherLongTermInvestments	3,034us-gaap_OtherLongTermInvestments
Investments	381,627us-gaap_Investments	291,660us-gaap_Investments
US Government and Government Agencies and Authorities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	134,601	98,621
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	423	28
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	590	1,169
Available-for-sale Securities, Debt Securities	134,434	97,480
Foreign Government Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	3,275	3,287
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	79	0
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	0	60
Available-for-sale Securities, Debt Securities	3,354	3,227
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	90,262	45,556
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	1,866	654
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	217	433
Available-for-sale Securities, Debt Securities	91,911	45,777
Public Utility, Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	9,044	9,103
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	217	122
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	39	92
Available-for-sale Securities, Debt Securities	9,222	9,133
All Other Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	111,787	118,084
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	1,409	792
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	580	1,469
Available-for-sale Securities, Debt Securities	112,616	117,407
Redeemable Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	1,094
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	9
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	10
Available-for-sale Securities, Debt Securities	1,093
Fixed Maturities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	350,063	274,651
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	4,003	1,596
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	1,436	3,223
Available-for-sale Securities, Debt Securities	352,630	273,024
Public Utility, Equities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	1,222	804
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	211	23
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	0	20
Available-for-sale Securities, Equity Securities	1,433	807
Common Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	19,560	12,749
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	3,738	1,894
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	250	97
Available-for-sale Securities, Equity Securities	23,048	14,546
Nonredeemable Preferred Stock [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	1,496	272
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	17	0
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	7	23
Available-for-sale Securities, Equity Securities	1,506	249
Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	22,278	13,825
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	3,966	1,917
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	257	140
Available-for-sale Securities, Equity Securities	25,987	15,602
Other Long-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Amortized Cost Basis	2,749	3,034
Available-for-sale Securities, Gross Unrealized Gain, Accumulated in Investments	261	0
Available-for-sale Securities, Gross Unrealized Loss, Accumulated in Investments	0	0
Other Long-term Investments	$ 3,010	$ 3,034

Net amount of the difference between the fair value and the cost of investments in available for sale securities.

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