Investments - Schedule of Unrealized Loss on Investments (Details) $ in Thousands		Jun. 30, 2015 USD ($) security	Dec. 31, 2014 USD ($) security
Less Than Twelve Months
Number of securities | security	[1]	307	142
Gross unrealized losses		$ 2,852	$ 921
Fair value		$ 177,113	$ 88,143
Twelve Months or More
Number of securities | security	[1]	37	49
Gross unrealized losses		$ 499	$ 772
Fair value		$ 32,045	$ 52,517
U.S. Government and Agency Securities
Less Than Twelve Months
Number of securities | security	[1]	31	32
Gross unrealized losses		$ 118	$ 285
Fair value		$ 47,959	$ 36,081
Twelve Months or More
Number of securities | security	[1]	20	20
Gross unrealized losses		$ 184	$ 305
Fair value		$ 13,040	$ 16,947
States, Municipalities and Political Subdivisions
Less Than Twelve Months
Number of securities | security	[1]	63	24
Gross unrealized losses		$ 1,310	$ 100
Fair value		$ 66,142	$ 22,272
Twelve Months or More
Number of securities | security	[1]	7	11
Gross unrealized losses		$ 39	$ 117
Fair value		$ 8,785	$ 14,310
Public Utilities
Less Than Twelve Months
Number of securities | security	[1]	1	1
Gross unrealized losses		$ 1	$ 1
Fair value		$ 1,274	$ 1,274
Twelve Months or More
Number of securities | security	[1]	1	1
Gross unrealized losses		$ 35	$ 38
Fair value		$ 1,013	$ 1,014
Corporate Securities
Less Than Twelve Months
Number of securities | security	[1]	74	23
Gross unrealized losses		$ 633	$ 271
Fair value		$ 50,588	$ 23,738
Twelve Months or More
Number of securities | security	[1]	8	16
Gross unrealized losses		$ 235	$ 309
Fair value		$ 9,112	$ 20,215
Redeemable Preferred Stocks
Less Than Twelve Months
Number of securities | security	[1]	15	4
Gross unrealized losses		$ 45	$ 10
Fair value		$ 1,366	$ 408
Twelve Months or More
Number of securities | security	[1]	0	0
Gross unrealized losses		$ 0	$ 0
Fair value		$ 0	$ 0
Fixed Maturities
Less Than Twelve Months
Number of securities | security	[1]	184	84
Gross unrealized losses		$ 2,107	$ 667
Fair value		$ 167,329	$ 83,773
Twelve Months or More
Number of securities | security	[1]	36	48
Gross unrealized losses		$ 493	$ 769
Fair value		$ 31,950	$ 52,486
Public Utilities
Less Than Twelve Months
Number of securities | security	[1]	14
Gross unrealized losses		$ 43
Fair value		$ 955
Twelve Months or More
Number of securities | security	[1]	0
Gross unrealized losses		$ 0
Fair value		$ 0
Common Stock
Less Than Twelve Months
Number of securities | security	[1]	87	54
Gross unrealized losses		$ 664	$ 247
Fair value		$ 7,343	$ 3,992
Twelve Months or More
Number of securities | security	[1]	1	1
Gross unrealized losses		$ 6	$ 3
Fair value		$ 95	$ 31
Non-Redeemable Preferred Stocks
Less Than Twelve Months
Number of securities | security	[1]	22	4
Gross unrealized losses		$ 38	$ 7
Fair value		$ 1,486	$ 378
Twelve Months or More
Number of securities | security	[1]	0	0
Gross unrealized losses		$ 0	$ 0
Fair value		$ 0	$ 0
Equity Securities
Less Than Twelve Months
Number of securities | security	[1]	123	58
Gross unrealized losses		$ 745	$ 254
Fair value		$ 9,784	$ 4,370
Twelve Months or More
Number of securities | security	[1]	1	1
Gross unrealized losses		$ 6	$ 3
Fair value		$ 95	$ 31

[1] This amount represents the actual number of discrete securities, not the number of shares of those securities. The numbers are not presented in thousands.