ADVANCES FROM FEDERAL HOME LOAN BANK OF SEATTLE (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Amount:
Maturing in one year or less	$ 27,000,000	$ 10,000,000
Maturing after one year through three years	0	0
Maturing after three years through five years	0	0
Maturing after five years	203,000	210,000
Total FHLB advances, at par	27,203,000	10,210,000	10,217,000
Fair value adjustment	47,000	94,000
Total FHLB advances, carried at fair value	27,250,000	10,304,000
Weighted Average Rate:
Maturing in one year or less, weighted average rate	0.23%	2.38%
Maturing after one year through three years, weighted average rate	0.00%	0.00%
Maturing after three years through five years, weighted average rate	0.00%	0.00%
Maturing after five years, weighted average rate	5.94%	5.94%
Total FHLB advances, at par, weighted average rate	0.27%	2.45%	2.45%
Federal Home Loan Bank, Advances, Activity for Year [Abstract]
Maximum outstanding at any month end, at par	60,377,000	10,216,000	36,522,000
Average outstanding, at par	18,935,000	10,215,000	14,699,000
Year-end outstanding at par	27,203,000	10,210,000	10,217,000
Weighted average interest rates, annual	0.52%	2.49%	2.52%
Weighted average interest rates, end of period	0.27%	2.45%	2.45%
Interest expense during the period	99,000	254,000	370,000
Subsidiary, Banner Bank [Member]
Federal Home Loan Bank, Advances, Activity for Year [Abstract]
Federal Home Loan Bank, advances, percentage of total assets to support credit line	35.00%
Federal Home Loan Bank, advances, maximum credit line	767,000,000
Subsidiary, Islanders Bank [Member]
Federal Home Loan Bank, Advances, Activity for Year [Abstract]
Federal Home Loan Bank, advances, percentage of total assets to support credit line	25.00%
Federal Home Loan Bank, advances, maximum credit line	$ 26,000,000