SECURITIES (Details)		1 Months Ended	12 Months Ended
	Oct. 01, 2022 USD ($)	Dec. 31, 2023 USD ($) security	Dec. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($)	Sep. 30, 2023 USD ($)	Jul. 25, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)
Debt securities available for sale		$ 67,564,000	$ 67,564,000	$ 73,536,000	$ 66,527,000		$ 69,098,000	$ 72,485,000
Fair Value of AFS Securities, Total		67,564,000	67,564,000	73,536,000
Transfer of securities from available for sale to held to maturity			0	212,340,000
Unrealized Loss	$ (46,800,000)
Transfer from available for sale	0
Carrying value of pledged assets		192,100,000	192,100,000	102,300,000
Sales of debt securities available for sale			$ 0
Number of Called Securities | security			3
Equity securities		$ 1,073,000	$ 1,073,000	1,056,000	978,000		992,000	1,033,000
Securities in unrealized loss position | security		69	69
Held-to-maturity securities		$ 200,644,000	$ 200,644,000	209,565,000	$ 202,646,000		$ 205,208,000	$ 207,637,000
Realized gain (loss) on equity securities			$ 17,000	(68,000)
Income tax expense (benefit) relating to net realized gains and losses				(305,000)
Proceeds from sales or calls of securities				23,271,000
BANC
Stock price increase (in percentage)		16.20%
Merger with Banc of California, Inc
Amount in investment agreements to issue						$ 400,000,000.0
Mortgage-Backed Securities
Investment portfolio percentage		76.00%	76.00%
Transfer of securities from available for sale to held to maturity	183,900,000
Securities in unrealized loss position | security		56	56
Held-to-maturity securities		$ 171,124,000	$ 171,124,000
Obligations of U.S. Government Agencies and Corporations
Investment portfolio percentage		17.00%	17.00%
Fair Value of AFS Securities, Total		$ 14,173,000	$ 14,173,000	13,705,000
Transfer of securities from available for sale to held to maturity	$ 28,400,000
Securities in unrealized loss position | security		5	5
Held-to-maturity securities		$ 29,520,000	$ 29,520,000	28,600,000
Corporate Debt Securities
Investment portfolio percentage		5.00%	5.00%
Fair Value of AFS Securities, Total		$ 13,828,000	$ 13,828,000	15,341,000
Debt security				24,700,000
Realized gain (loss) on debt securities				(1,500,000)
Obligations of State and Political Subdivisions
Investment portfolio percentage		2.00%	2.00%
Fair Value of AFS Securities, Total		$ 6,508,000	$ 6,508,000	7,679,000
Debt Securities Maturity Term			5 years
Federal Farm Credit Bank
Fair Value of AFS Securities, Total		11,300,000	$ 11,300,000	10,900,000
Pennsylvania Housing Finance
Fair Value of AFS Securities, Total		4,900,000	4,900,000	$ 6,100,000
Subordinated Debt | Pacific Western Bank
Debt securities available for sale		1,500,000	1,500,000
Subordinated debt		$ 1,500,000	$ 1,500,000