REGULATORY CAPITAL REQUIREMENTS (Tables)

12 Months Ended

Dec. 31, 2023

Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]

Schedule of the Regulatory Capital Ratios and Minimum Regulatory Requirements

The following table shows the regulatory capital ratios of the Company and the Bank and the minimum regulatory requirements (dollars in thousands):

	Actual				Minimum for Capital Adequacy Purposes				Minimum to be Categorized as “Well Capitalized” Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio
December 31, 2023:
Banner Corporation—consolidated:
Total capital to risk-weighted assets	$	1,904,533	14.58	%	$	1,045,181	8.00	%	$	1,306,476	10.00	%
Tier 1 capital to risk-weighted assets	1,650,872		12.64		783,886		6.00		783,886		6.00
Tier 1 capital to average leverage assets	1,650,872		10.56		625,387		4.00		n/a		n/a
Tier 1 common equity to risk-weighted assets	1,564,372		11.97		587,914		4.50		n/a		n/a
Banner Bank:
Total capital to risk-weighted assets	1,789,371		13.69		1,045,273		8.00		1,306,592		10.00
Tier 1 capital to risk-weighted assets	1,635,710		12.52		783,955		6.00		1,045,273		8.00
Tier 1 capital to average leverage assets	1,635,710		10.46		625,298		4.00		781,622		5.00
Tier 1 common equity to risk-weighted assets	1,635,710		12.52		587,966		4.50		849,285		6.50
December 31, 2022:
Banner Corporation—consolidated:
Total capital to risk-weighted assets	$	1,769,064	14.04	%	$	1,008,232	8.00	%	$	1,260,290	10.00	%
Tier 1 capital to risk-weighted assets	1,528,694		12.13		756,174		6.00		756,174		6.00
Tier 1 capital to average leverage assets	1,528,694		9.45		647,345		4.00		n/a		n/a
Tier 1 common equity to risk-weighted assets	1,442,194		11.44		567,130		4.50		n/a		n/a
Banner Bank:
Total capital to risk-weighted assets	1,684,766		13.38		1,007,325		8.00		1,259,156		10.00
Tier 1 capital to risk-weighted assets	1,544,396		12.27		755,494		6.00		1,007,325		8.00
Tier 1 capital to average leverage assets	1,544,396		9.55		646,935		4.00		808,668		5.00
Tier 1 common equity to risk-weighted assets	1,544,396		12.27		566,620		4.50		818,452		6.50