Investments - Schedule of Unrealized Loss on Investments (Details) $ in Thousands	Sep. 30, 2019 USD ($) security	Dec. 31, 2018 USD ($) security
U.S. Government and Agency Securities
Schedule of Available-for-sale Securities
Available-for-sale Securities	$ 115,413	$ 98,975
Less Than Twelve Months
Number of securities \| security	20	45
Gross unrealized losses	$ 50	$ 111
Fair value	$ 18,550	$ 28,464
Twelve Months or More
Number of securities \| security	40	55
Gross unrealized losses	$ 151	$ 1,204
Fair value	34,669	61,264
States, Municipalities and Political Subdivisions
Schedule of Available-for-sale Securities
Available-for-sale Securities	$ 137,447	$ 144,468
Less Than Twelve Months
Number of securities \| security	24	49
Gross unrealized losses	$ 40	$ 272
Fair value	$ 21,349	$ 38,469
Twelve Months or More
Number of securities \| security	4	91
Gross unrealized losses	$ 10	$ 1,029
Fair value	3,188	68,115
Public Utilities
Schedule of Available-for-sale Securities
Available-for-sale Securities	$ 30,128	$ 23,890
Less Than Twelve Months
Number of securities \| security	9	30
Gross unrealized losses	$ 28	$ 374
Fair value	$ 4,634	$ 13,685
Twelve Months or More
Number of securities \| security	2	19
Gross unrealized losses	$ 1	$ 307
Fair value	250	7,805
Corporate Securities
Schedule of Available-for-sale Securities
Available-for-sale Securities	$ 296,493	$ 301,988
Less Than Twelve Months
Number of securities \| security	49	351
Gross unrealized losses	$ 62	$ 3,149
Fair value	$ 21,686	$ 144,769
Twelve Months or More
Number of securities \| security	45	208
Gross unrealized losses	$ 56	$ 3,010
Fair value	18,617	117,351
Mortgage-backed securities
Schedule of Available-for-sale Securities
Available-for-sale Securities	$ 275,254	$ 223,854
Less Than Twelve Months
Number of securities \| security	52	87
Gross unrealized losses	$ 84	$ 1,303
Fair value	$ 25,835	$ 88,754
Twelve Months or More
Number of securities \| security	56	135
Gross unrealized losses	$ 159	$ 2,180
Fair value	16,691	70,510
Asset-backed Securities
Schedule of Available-for-sale Securities
Available-for-sale Securities	$ 60,287	$ 64,037
Less Than Twelve Months
Number of securities \| security	14	67
Gross unrealized losses	$ 12	$ 136
Fair value	$ 7,466	$ 41,871
Twelve Months or More
Number of securities \| security	6	7
Gross unrealized losses	$ 9	$ 3
Fair value	2,260	1,372
Redeemable Preferred Stocks
Schedule of Available-for-sale Securities
Available-for-sale Securities	$ 2,118	$ 1,151
Less Than Twelve Months
Number of securities \| security	3	8
Gross unrealized losses	$ 12	$ 62
Fair value	$ 1,104	$ 711
Twelve Months or More
Number of securities \| security	2	2
Gross unrealized losses	$ 36	$ 77
Fair value	199	8,377
Fixed Maturities
Schedule of Available-for-sale Securities
Available-for-sale Securities	$ 921,212	$ 862,345
Less Than Twelve Months
Number of securities \| security	171	642
Gross unrealized losses	$ 288	$ 5,423
Fair value	$ 100,624	$ 359,701
Twelve Months or More
Number of securities \| security	157	517
Gross unrealized losses	$ 423	$ 7,810
Fair value	76,474	334,794
Foreign Government
Schedule of Available-for-sale Securities
Available-for-sale Securities	$ 4,072	$ 3,982
Less Than Twelve Months
Number of securities \| security	0	5
Gross unrealized losses	$ 0	$ 16
Fair value	$ 0	$ 2,978
Twelve Months or More
Number of securities \| security	2	0
Gross unrealized losses	$ 1	$ 0
Fair value	$ 600	$ 0

Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months [Abstract]

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Available For Sale Securities Continuous Unrealized Loss Position Twelve Months or More [Abstract]

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer.

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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months.

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This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.

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Number of investment positions in available-for-sale investments in a continuous unrealized loss position for less than one year or normal operating cycle, if longer, for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

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Number of investment positions in available-for-sale investments that have been in a continuous unrealized loss position for greater than or equal to a year for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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