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Securities Securities (Held-to-Maturity Securities) (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	$ 37,778	$ 38,612
Gross unrealized gains	177	87
Gross unrealized losses	(259)	(179)
Fair value	37,696	38,520
U.S. government agency obligations - government-sponsored enterprises
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	1,499	1,497
Gross unrealized gains	0	2
Gross unrealized losses	(9)	(5)
Fair value	1,490	1,494
Municipal obligations
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	21,680	21,173
Gross unrealized gains	176	62
Gross unrealized losses	(34)	(78)
Fair value	21,822	21,157
Collateralized mortgage obligations - government issued
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	9,072	9,148
Gross unrealized gains	1	17
Gross unrealized losses	(130)	(38)
Fair value	8,943	9,127
Collateralized mortgage obligations - government-sponsored enterprises
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	5,527	6,794
Gross unrealized gains	0	6
Gross unrealized losses	(86)	(58)
Fair value	$ 5,441	$ 6,742

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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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