SCHEDULE I -SUMMARY OF INVESTMENTS-OTHER THAN INVESTMENTS IN RELATED PARTIES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Amount at which shown in the balance sheet	$ 20,324
Money markets fund classified with cash and cash equivalent and excluded from other investments in related party	52,002
Total Investments [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	575,736
Fair value	651,257
Amount at which shown in the balance sheet	651,257	[1]
Limited Partnership [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	68,988
Fair value	68,988
Amount at which shown in the balance sheet	68,988	[1]
Bonds [Member] | Total Fixed Maturities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	429,770
Fair value	431,550
Amount at which shown in the balance sheet	431,550	[1]
Bonds [Member] | U.S Government Obligations [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	113,348
Fair value	113,389
Amount at which shown in the balance sheet	113,389	[1]
Bonds [Member] | Mortgage-backed Securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	40,464
Fair value	41,817
Amount at which shown in the balance sheet	41,817	[1]
Bonds [Member] | State and Municipal Obligations [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	115,278
Fair value	115,250
Amount at which shown in the balance sheet	115,250	[1]
Bonds [Member] | Foreign Government Obligations [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	23,689
Fair value	23,879
Amount at which shown in the balance sheet	23,879	[1]
Bonds [Member] | Corporate Securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	136,991
Fair value	137,215
Amount at which shown in the balance sheet	137,215	[1]
Common Stocks [Member] | Total Equity Securities [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	72,087
Fair value	145,828
Amount at which shown in the balance sheet	145,828	[1]
Common Stocks [Member] | Industrial, Miscellaneous, and All Others [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	72,087
Fair value	145,828
Amount at which shown in the balance sheet	145,828	[1]
Short-term [Member] | Total Short-term and Other [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	4,891
Fair value	4,891
Amount at which shown in the balance sheet	4,891	[1]
Short-term [Member] | Certificates of Deposit [Member]
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost	4,891
Fair value	4,891
Amount at which shown in the balance sheet	$ 4,891	[1]

[1] Investments presented above do not include $52,002 of money market funds classified with cash and cash equivalents in the balance sheet.