LOANS RECEIVABLE AND THE ALLOWANCE FOR LOAN LOSSES (Troubled Debt Restructuring Which Incurred Payment Default) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 loan	Dec. 31, 2015 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDRs Which Incurred Payment Default, Number of Loans | loan	0	3
TDRs Which Incurred a Payment Default | $		$ 664
Agricultural Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDRs Which Incurred Payment Default, Number of Loans | loan		2
TDRs Which Incurred a Payment Default | $		$ 277
One- to four-family residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
TDRs Which Incurred Payment Default, Number of Loans | loan		1
TDRs Which Incurred a Payment Default | $		$ 387