SECURITIES - Amortized cost, fair value and tax equivalent yield of securities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Municipal bonds - Within 1 year
Amortized cost	$ 75
Fair value	$ 75
Yield	4.92%
Municipal bonds - After 1 year but within 5 years
Amortized cost	$ 869
Fair value	$ 873
Yield	5.48%
Municipal bonds - After 10 years but within 15 years
Amortized cost	$ 4,478
Fair value	$ 4,522
Yield	6.64%
Municipal bonds - After 15 years
Amortized cost	$ 7,394
Fair value	$ 7,483
Yield	6.73%
Municipal bonds - Total
Amortized cost	$ 12,816
Fair value	$ 12,953
Yield	6.61%
Mortgage-backed securities - U.S. Government agency and U.S. Government-sponsored enterprises
Amortized cost	$ 49,217
Fair value	$ 49,209
Yield	2.35%
Collateralized mortgage obligations - U.S. Government agency and U.S. Government-sponsored enterprises
Amortized cost	$ 6,360
Fair value	$ 6,363
Yield	2.64%
Collateralized mortgage obligations - Non-agency
Amortized cost	$ 2,997
Fair value	$ 3,407
Yield	4.04%
SBA bonds
Amortized cost	$ 1,876
Fair value	$ 1,882
Yield	3.48%
CRA mutual funds
Amortized cost	$ 838
Fair value	$ 822
Yield	4.51%
Corporate bonds - After 5 years but within 10 years
Amortized cost	$ 2,000
Fair value	$ 2,041
Yield	5.50%
Preferred stock
Amortized cost	$ 7
Fair value	$ 172
Yield	0.00%
Securities available-for-sale
Amortized cost	$ 76,111
Fair value	$ 76,849
Yield	3.29%