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Investment Securities (Details 2) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017 USD ($) Investment	Dec. 31, 2016 USD ($) Investment
Summary of gross unrealized losses on investment securities and fair market value of related securities
Number of investments, Less than 12 months | Investment	54	63
Available-for-sale Securities, Less than 12 months, Fair Value	$ 43,323	$ 47,809
Available-for-sale Securities, Less than 12 months, Unrealized losses	$ 684	$ 897
Number of investments, 12 months or longer | Investment	3	2
Available-for-sale Securities, 12 months or longer, Fair Value	$ 5,143	$ 3,991
Available-for-sale Securities, 12 Months or longer, Unrealized losses	$ 46	$ 30
Number of investments, Total | Investment	57	65
Available-for-sale Securities, Fair Value, Total	$ 48,466	$ 51,800
Available-for-sale Securities, Unrealized losses, Total	$ 730	$ 927
US government agencies [Member]
Summary of gross unrealized losses on investment securities and fair market value of related securities
Number of investments, Less than 12 months | Investment	4	5
Available-for-sale Securities, Less than 12 months, Fair Value	$ 3,967	$ 5,144
Available-for-sale Securities, Less than 12 months, Unrealized losses	$ 90	$ 113
Number of investments, 12 months or longer | Investment
Available-for-sale Securities, 12 months or longer, Fair Value
Available-for-sale Securities, 12 Months or longer, Unrealized losses
Number of investments, Total | Investment	4	5
Available-for-sale Securities, Fair Value, Total	$ 3,967	$ 5,144
Available-for-sale Securities, Unrealized losses, Total	$ 90	$ 113
SBA securities [Member]
Summary of gross unrealized losses on investment securities and fair market value of related securities
Number of investments, Less than 12 months | Investment		1
Available-for-sale Securities, Less than 12 months, Fair Value		$ 1,437
Available-for-sale Securities, Less than 12 months, Unrealized losses		$ 16
Number of investments, 12 months or longer | Investment	1
Available-for-sale Securities, 12 months or longer, Fair Value	$ 1,421
Available-for-sale Securities, 12 Months or longer, Unrealized losses	$ 16
Number of investments, Total | Investment	1	1
Available-for-sale Securities, Fair Value, Total	$ 1,421	$ 1,437
Available-for-sale Securities, Unrealized losses, Total	$ 16	$ 16
State and political subdivisions [Member]
Summary of gross unrealized losses on investment securities and fair market value of related securities
Number of investments, Less than 12 months | Investment	24	32
Available-for-sale Securities, Less than 12 months, Fair Value	$ 10,519	$ 13,936
Available-for-sale Securities, Less than 12 months, Unrealized losses	$ 198	$ 292
Number of investments, 12 months or longer | Investment
Available-for-sale Securities, 12 months or longer, Fair Value
Available-for-sale Securities, 12 Months or longer, Unrealized losses
Number of investments, Total | Investment	24	32
Available-for-sale Securities, Fair Value, Total	$ 10,519	$ 13,936
Available-for-sale Securities, Unrealized losses, Total	$ 198	$ 292
Mortgage-backed securities [Member]
Summary of gross unrealized losses on investment securities and fair market value of related securities
Number of investments, Less than 12 months | Investment	26	25
Available-for-sale Securities, Less than 12 months, Fair Value	$ 28,837	$ 27,292
Available-for-sale Securities, Less than 12 months, Unrealized losses	$ 396	$ 476
Number of investments, 12 months or longer | Investment	2	2
Available-for-sale Securities, 12 months or longer, Fair Value	$ 3,722	$ 3,991
Available-for-sale Securities, 12 Months or longer, Unrealized losses	$ 30	$ 30
Number of investments, Total | Investment	28	27
Available-for-sale Securities, Fair Value, Total	$ 32,559	$ 31,283
Available-for-sale Securities, Unrealized losses, Total	$ 426	$ 506

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 50
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