BUSINESS COMBINATION - Additional Information (Details) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended		12 Months Ended
	Jul. 24, 2025 USD ($)	Jul. 23, 2025 USD ($) branch $ / shares shares	Jan. 31, 2025 USD ($)	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)
Business Combination [Line Items]
Goodwill				$ 88,400
Merger and integration costs				0	$ 1,529
Proceeds from sales of available-for-sale securities		$ 204,100		36,670	0
Debt securities available to sold		229,100
Gain (loss) recognized on sale of debt securities		$ 0
FHLB borrowings repaid	$ 273,000
Outstanding advances from FHLB	$ 437,000			$ 164,000		$ 164,000
Core Deposits
Business Combination [Line Items]
Amortization of intangible assets				10 years
Financial Asset Acquired with Credit Deterioration
Business Combination [Line Items]
Allowance for credit losses at acquisition			$ 16,400
Essa Acquisition
Business Combination [Line Items]
Merger right to receive shares of acquirer		0.8547
Total merger consideration		$ 202,570
Equity interest issued (in shares) | shares		8,359,430
Equity interest issued		$ 202,500
Closing stock price (in USD per share) | $ / shares		$ 24.23
Payments to acquire businesses		$ 21
Goodwill		44,638		$ 44,600		44,600
Goodwill measurement period adjustments						$ 5,300
Merger and integration costs				$ 0	$ 1,500
Loans receivable		1,658,693
Net loans held for investment identified as PCD loans		138,595
Allowance for credit losses at acquisition		$ 1,857
Number Of branches acquired | branch		20
Number of owned premises from acquisition | branch		10
Essa Acquisition | Financial Asset Acquired with Credit Deterioration
Business Combination [Line Items]
Net loans held for investment identified as PCD loans		$ 138,600
Allowance for credit losses at acquisition		16,400
Essa Acquisition | Preliminary
Business Combination [Line Items]
Goodwill		$ 49,900