Investments Investments (Available for Sale) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 514,980	$ 468,171
Gross Unrealized Holding Gains	1,914	13,627
Gross Unrealized Holding Losses	(8,883)	(2,475)
Estimated Fair Value	508,011	479,323
Total fixed maturities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		422,255
Gross Unrealized Holding Gains		5,180
Gross Unrealized Holding Losses		(2,244)
Estimated Fair Value		425,191
U.S. Treasury securities and obligations of U.S. government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	609	9,108
Gross Unrealized Holding Gains	1	4
Gross Unrealized Holding Losses	(2)	(14)
Estimated Fair Value	608	9,098
Obligations of states, municipalities and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	155,310	161,012
Gross Unrealized Holding Gains	1,200	3,726
Gross Unrealized Holding Losses	(3,001)	(412)
Estimated Fair Value	153,509	164,326
Corporate and other securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	98,104	71,224
Gross Unrealized Holding Gains	279	579
Gross Unrealized Holding Losses	(941)	(172)
Estimated Fair Value	97,442	71,631
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	151,526	95,223
Gross Unrealized Holding Gains	97	405
Gross Unrealized Holding Losses	(1,333)	(268)
Estimated Fair Value	150,290	95,360
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	109,431	85,688
Gross Unrealized Holding Gains	337	466
Gross Unrealized Holding Losses	(3,606)	(1,378)
Estimated Fair Value	$ 106,162	84,776
Total equity securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		45,916
Gross Unrealized Holding Gains		8,447
Gross Unrealized Holding Losses		(231)
Estimated Fair Value		54,132
Exchange traded funds [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		26,041
Gross Unrealized Holding Gains		8,339
Gross Unrealized Holding Losses		0
Estimated Fair Value		34,380
Nonredeemable preferred stock [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		19,875
Gross Unrealized Holding Gains		108
Gross Unrealized Holding Losses		(231)
Estimated Fair Value		$ 19,752

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

No definition available.

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- Definition

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

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- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

No definition available.

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- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

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- Definition

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.

+ References

No definition available.

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