Investments - Available-for-sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Debt maturity securities, amortized cost	$ 124,046	$ 122,678
Debt securities, gross unrealized gain	1,964	248
Debt securities, gross unrealized loss	(306)	(2,486)
Debt securities, estimated fair value	125,704	120,440
U.S. Government
Debt Securities, Available-for-sale [Line Items]
Debt maturity securities, amortized cost	13,917	15,360
Debt securities, gross unrealized gain	72	3
Debt securities, gross unrealized loss	(10)	(178)
Debt securities, estimated fair value	13,979	15,185
State and local government
Debt Securities, Available-for-sale [Line Items]
Debt maturity securities, amortized cost	14,091	15,847
Debt securities, gross unrealized gain	582	115
Debt securities, gross unrealized loss	0	(174)
Debt securities, estimated fair value	14,673	15,788
Corporate debt
Debt Securities, Available-for-sale [Line Items]
Debt maturity securities, amortized cost	37,308	30,423
Debt securities, gross unrealized gain	855	74
Debt securities, gross unrealized loss	(14)	(651)
Debt securities, estimated fair value	38,149	29,846
Asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt maturity securities, amortized cost	20,167	24,468
Debt securities, gross unrealized gain	84	24
Debt securities, gross unrealized loss	(57)	(208)
Debt securities, estimated fair value	20,194	24,284
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt maturity securities, amortized cost	30,206	30,377
Debt securities, gross unrealized gain	147	18
Debt securities, gross unrealized loss	(221)	(1,155)
Debt securities, estimated fair value	30,132	29,240
Commercial mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Debt maturity securities, amortized cost	4,271	4,025
Debt securities, gross unrealized gain	193	5
Debt securities, gross unrealized loss	0	(77)
Debt securities, estimated fair value	4,464	3,953
Collateralized mortgage obligations
Debt Securities, Available-for-sale [Line Items]
Debt maturity securities, amortized cost	4,086	2,178
Debt securities, gross unrealized gain	31	9
Debt securities, gross unrealized loss	(4)	(43)
Debt securities, estimated fair value	$ 4,113	$ 2,144

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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