Schedule I (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Securities, Amortized Cost Basis	$ 450,074	$ 375,090
Investments	452,714	381,627
US Government and Government Agencies and Authorities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	81,973	134,601
Available-for-sale Securities, Debt Securities	81,647	134,434
Foreign Government Debt Securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	2,038	3,275
Available-for-sale Securities, Debt Securities	2,075	3,354
US States and Political Subdivisions Debt Securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	154,004	90,262
Available-for-sale Securities, Debt Securities	155,905	91,911
Public Utility, Bonds [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	8,398	9,044
Available-for-sale Securities, Debt Securities	8,493	9,222
All Other Corporate Bonds [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	148,170	111,787
Available-for-sale Securities, Debt Securities	146,758	112,616
Redeemable Preferred Stock [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	1,832	1,094
Available-for-sale Securities, Debt Securities	1,820	1,093
Debt Securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	396,415
Fixed Maturities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	396,415	350,063
Available-for-sale Securities, Debt Securities	396,698	352,630
Mutual Fund [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	26,357
Available-for-sale Securities, Equity Securities	26,343
Public Utility, Equities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	1,342	1,222
Available-for-sale Securities, Equity Securities	1,352	1,433
Other Common Stock [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	18,624	19,560
Available-for-sale Securities, Equity Securities	20,694	23,048
Common Stock [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Securities, Equity Securities	20,694
Nonredeemable Preferred Stock [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	2,356	1,496
Available-for-sale Securities, Equity Securities	2,417	1,506
Equity Securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Equity Securities, Amortized Cost Basis	48,679	22,278
Available-for-sale Securities, Equity Securities	50,806	25,987
Other Long-term Investments [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Available-for-sale Securities, Amortized Cost Basis	4,980	2,749
Other Long-term Investments	$ 5,210	$ 3,010