SECURITIES - Amortized cost, fair value and tax equivalent yield of securities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
U.S. Government agency notes - After 1 year but within 5 years
Amortized cost	$ 505
Fair value	$ 503
Yield	3.63%
U.S. Government agency notes - After 5 years but within 10 years
Amortized cost	$ 6,886
Fair value	$ 7,010
Yield	3.48%
U.S. Government agency notes - Total
Amortized cost	$ 7,391
Fair value	$ 7,513
Yield	3.49%
Municipal bonds - Within 1 year
Amortized cost	$ 257
Fair value	$ 257
Yield	2.44%
Municipal bonds - After 10 years
Amortized cost	$ 8,994
Fair value	$ 9,234
Yield	4.06%
Municipal bonds - Total
Amortized cost	$ 9,251
Fair value	$ 9,491
Yield	4.02%
Mortgage-backed securities and Collateralized mortgage obligations - U.S. Government agencies
Amortized cost	$ 76,502
Fair value	$ 76,964
Yield	2.92%
Corporate bonds - After 5 years but within 10 years
Amortized cost	$ 4,250
Fair value	$ 4,287
Yield	5.43%
Fair value
Amortized cost	$ 97,394
Fair value	$ 98,255
Yield	3.04%