Securities - Reconciliation from Amortized Cost to Estimated Fair Value of Marketable Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Available for sale at fair value:
Amortized cost	$ 45,009	$ 52,869
Gross unrealized gains	861	679
Gross unrealized losses	(604)	(683)
Securities available for sale	45,266	52,865
Held to maturity at cost:
Amortized cost	28,728	18,471
Gross unrealized gains	648	328
Gross unrealized losses	(43)	(192)
Estimated fair value	29,333	18,607
U.S. Government sponsored entities
Available for sale at fair value:
Amortized cost	6,958	6,649
Gross unrealized gains	84	0
Gross unrealized losses	0	(68)
Securities available for sale	7,042	6,581
Held to maturity at cost:
Amortized cost	3,774	3,988
Gross unrealized gains	16	0
Gross unrealized losses	0	(87)
Estimated fair value	3,790	3,901
State and political subdivisions
Available for sale at fair value:
Amortized cost	5,588	10,625
Gross unrealized gains	66	159
Gross unrealized losses	(4)	(2)
Securities available for sale	5,650	10,782
Held to maturity at cost:
Amortized cost	2,360	2,364
Gross unrealized gains	246	187
Gross unrealized losses	0	(1)
Estimated fair value	2,606	2,550
Residential mortgage-backed securities
Available for sale at fair value:
Amortized cost	23,119	26,191
Gross unrealized gains	697	449
Gross unrealized losses	(109)	(201)
Securities available for sale	23,707	26,439
Held to maturity at cost:
Amortized cost	5,651	6,232
Gross unrealized gains	177	141
Gross unrealized losses	(3)	(28)
Estimated fair value	5,825	6,345
Commercial mortgage-backed securities
Held to maturity at cost:
Amortized cost	3,849	3,902
Gross unrealized gains	114	0
Gross unrealized losses	0	(62)
Estimated fair value	3,963	3,840
Corporate and other securities
Available for sale at fair value:
Amortized cost	9,344	9,404
Gross unrealized gains	14	71
Gross unrealized losses	(491)	(412)
Securities available for sale	8,867	9,063
Held to maturity at cost:
Amortized cost	13,094	1,985
Gross unrealized gains	95	0
Gross unrealized losses	(40)	(14)
Estimated fair value	$ 13,149	$ 1,971

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

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