PARENT COMPANY AND REGULATORY RESTRICTIONS (Required Capital and Capital Ratios) (Details) $ in Thousands		12 Months Ended
	Jan. 01, 2019	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Leverage capital
Actual Amount		$ 729,850	$ 704,045
Actual Ratio		0.098	0.093
Minimum amount required to be adequately capitalized		$ 297,858	$ 301,967
Minimum ratio required to be adequately capitalized		0.040	0.040
Tier 1 risk-based capital
Actual Amount		$ 729,850	$ 704,045
Actual Ratio		0.136	0.132
Minimum amount required to be adequately capitalized		$ 321,531	$ 319,155
Minimum ratio required to be adequately capitalized		0.060	0.060
Total risk-based capital
Actual Amount		$ 794,911	$ 820,796
Actual Ratio		0.148	0.154
Minimum amount required to be adequately capitalized		$ 428,708	$ 425,540
Minimum ratio required to be adequately capitalized		0.080	0.080
CET1 risk-based capital
Actual Amount		$ 679,850	$ 654,045
Actual Ratio		12.70%	12.30%
Minimum amount required for capital adequacy purposes		$ 241,149	$ 239,366
Minimum ratio required for capital adequacy purposes		4.50%	4.50%
Capital Conservation Buffer, Year Three	2.50%
Central Bank
PARENT COMPANY AND REGULATORY RESTRICTIONS
Equity in undistributed losses		$ (250,500)	$ (288,400)
Leverage capital
Actual Amount		$ 720,980	$ 731,155
Actual Ratio		0.097	0.097
Minimum amount required to be adequately capitalized		$ 297,503	$ 301,410
Minimum ratio required to be adequately capitalized		0.040	0.040
Minimum amount required to be well-capitalized		$ 371,879	$ 376,763
Minimum ratio required to be well-capitalized		0.050	0.050
Tier 1 risk-based capital
Actual Amount		$ 720,980	$ 731,155
Actual Ratio		0.135	0.138
Minimum amount required to be adequately capitalized		$ 320,840	$ 318,419
Minimum ratio required to be adequately capitalized		0.060	0.060
Minimum amount required to be well-capitalized		$ 427,787	$ 424,558
Minimum ratio required to be well-capitalized		0.080	0.080
Total risk-based capital
Actual Amount		$ 786,041	$ 792,906
Actual Ratio		0.147	0.149
Minimum amount required to be adequately capitalized		$ 427,787	$ 424,558
Minimum ratio required to be adequately capitalized		0.080	0.080
Minimum amount required to be well-capitalized		$ 534,734	$ 530,698
Minimum ratio required to be well-capitalized		0.100	0.100
CET1 risk-based capital
Actual Amount		$ 720,980	$ 731,155
Actual Ratio		13.50%	13.80%
Minimum amount required for capital adequacy purposes		$ 240,630	$ 238,814
Minimum ratio required for capital adequacy purposes		4.50%	4.50%
Minimum amount equired to be well-capitalized		$ 347,577	$ 344,953
Minimum ratio required to be well-capitalized		6.50%	6.50%