Securities - Amortized Cost to Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Available for sale at fair value:
Amortized cost	$ 46,770	$ 47,762
Gross unrealized gains	131	201
Gross unrealized losses	(967)	(1,250)
Estimated fair value	45,934	46,713
Held to maturity at cost:
Amortized cost	14,780	14,875
Gross unrealized gains	211	211
Gross unrealized losses	(224)	(284)
Estimated fair value	14,767	14,802
Equity Securities:
Amortized cost	2,398	2,394
Gross unrealized gains	35	0
Gross unrealized losses	(185)	(250)
Estimated fair value	2,248	2,144
U.S. Government sponsored entities
Available for sale at fair value:
Amortized cost	5,756	5,758
Gross unrealized gains	0	0
Gross unrealized losses	(78)	(116)
Estimated fair value	5,678	5,642
Held to maturity at cost:
Amortized cost	2,527	2,527
Gross unrealized gains	0	0
Gross unrealized losses	(82)	(94)
Estimated fair value	2,445	2,433
State and political subdivisions
Available for sale at fair value:
Amortized cost	4,547	4,614
Gross unrealized gains	20	4
Gross unrealized losses	(65)	(120)
Estimated fair value	4,502	4,498
Held to maturity at cost:
Amortized cost	951	951
Gross unrealized gains	115	110
Gross unrealized losses	0	0
Estimated fair value	1,066	1,061
Residential mortgage-backed securities
Available for sale at fair value:
Amortized cost	26,237	27,159
Gross unrealized gains	81	74
Gross unrealized losses	(467)	(620)
Estimated fair value	25,851	26,613
Held to maturity at cost:
Amortized cost	3,249	3,312
Gross unrealized gains	21	17
Gross unrealized losses	(34)	(52)
Estimated fair value	3,236	3,277
Commercial mortgage-backed securities
Held to maturity at cost:
Amortized cost	3,540	3,570
Gross unrealized gains	0	0
Gross unrealized losses	(107)	(138)
Estimated fair value	3,433	3,432
Corporate and other securities
Available for sale at fair value:
Amortized cost	10,230	10,231
Gross unrealized gains	30	123
Gross unrealized losses	(357)	(394)
Estimated fair value	9,903	9,960
Held to maturity at cost:
Amortized cost	4,513	4,515
Gross unrealized gains	75	84
Gross unrealized losses	(1)	0
Estimated fair value	$ 4,587	$ 4,599

Trading Securities, Accumulated Unrecognized Holding Gain

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Trading Securities, Accumulated Unrecognized Holding Loss

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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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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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