Securities - Amortized Cost to Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Available for sale at fair value:
Amortized cost	$ 52,661	$ 40,839
Gross unrealized gains	337	360
Gross unrealized losses	(752)	(631)
Securities available for sale	52,246	40,568
Held to maturity at cost:
Amortized cost	20,776	20,979
Gross unrealized gains	298	291
Gross unrealized losses	(345)	(302)
Estimated fair value	20,729	20,968
U.S. Government sponsored entities
Available for sale at fair value:
Amortized cost	3,745	3,744
Gross unrealized gains	2	2
Gross unrealized losses	(26)	(30)
Securities available for sale	3,721	3,716
Held to maturity at cost:
Amortized cost	3,530	3,530
Gross unrealized gains	0	0
Gross unrealized losses	(116)	(128)
Estimated fair value	3,414	3,402
State and political subdivisions
Available for sale at fair value:
Amortized cost	5,919	5,545
Gross unrealized gains	21	19
Gross unrealized losses	(77)	(62)
Securities available for sale	5,863	5,502
Held to maturity at cost:
Amortized cost	2,304	2,306
Gross unrealized gains	175	181
Gross unrealized losses	0	(1)
Estimated fair value	2,479	2,486
Residential mortgage-backed securities
Available for sale at fair value:
Amortized cost	32,864	21,547
Gross unrealized gains	311	339
Gross unrealized losses	(381)	(255)
Securities available for sale	32,794	21,631
Held to maturity at cost:
Amortized cost	4,629	4,799
Gross unrealized gains	80	98
Gross unrealized losses	(36)	(25)
Estimated fair value	4,673	4,872
Commercial mortgage-backed securities
Held to maturity at cost:
Amortized cost	3,768	3,796
Gross unrealized gains	0	0
Gross unrealized losses	(179)	(148)
Estimated fair value	3,589	3,648
Corporate and other securities
Available for sale at fair value:
Amortized cost	10,133	10,003
Gross unrealized gains	3	0
Gross unrealized losses	(268)	(284)
Securities available for sale	9,868	9,719
Held to maturity at cost:
Amortized cost	6,545	6,548
Gross unrealized gains	43	12
Gross unrealized losses	(14)	0
Estimated fair value	$ 6,574	$ 6,560

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

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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