CORRESPONDENT BANK STOCK - CORRESPONDENT BANK STOCK (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Investment Holdings [Line Items]
Correspondent bank stock, at cost	$ 2,488	$ 1,555
FHLB Topeka
Investment Holdings [Line Items]
Correspondent bank stock, at cost	2,413	1,480
BBW
Investment Holdings [Line Items]
Correspondent bank stock, at cost	$ 75	$ 75