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FAIR VALUE DISCLOSURES - Estimated Fair Values And The Related Carrying Values Of Financial Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Financial Assets:    
Securities available-for-sale, at fair value $ 1,192,186 $ 1,398,558
Securities held-to-maturity 103,326 0
Carrying Value    
Financial Assets:    
Cash and cash equivalents 204,802 683,240
Securities available-for-sale, at fair value 1,192,186  
Securities held-to-maturity 127,820  
Securities available-for-sale, at fair value   1,398,558
Real estate mortgages held-for-sale 1,097 7,470
Loans, net 4,422,596 4,220,068
Mortgage banking derivative 83 398
Interest rate swap derivative 38,909 14,309
Federal Reserve and Federal Home Loan Bank Stock 12,840 13,772
Accrued interest receivable 22,822 17,674
Financial Liabilities:    
Certificates of deposit 750,304 829,518
All other deposits 4,913,829 4,905,889
Federal Home Loan Bank advances   75,000
Mortgage banking derivative 0 2
Interest rate swap derivative 38,910 14,329
Standby letters of credit 234 272
Accrued interest payable 2,200 2,619
Estimated Fair Value    
Financial Assets:    
Cash and cash equivalents 204,802 683,240
Securities available-for-sale, at fair value 1,192,186  
Securities held-to-maturity 103,326  
Securities available-for-sale, at fair value   1,398,558
Real estate mortgages held-for-sale 1,117 7,634
Loans, net 4,246,842 4,144,000
Mortgage banking derivative 83 398
Interest rate swap derivative 38,909 14,309
Accrued interest receivable 22,822 17,674
Financial Liabilities:    
Certificates of deposit 751,974 833,617
All other deposits 4,913,829 4,905,889
Federal Home Loan Bank advances   66,118
Mortgage banking derivative 0 2
Interest rate swap derivative 38,910 14,329
Standby letters of credit 234 272
Accrued interest payable 2,200 2,619
Level 1 | Estimated Fair Value    
Financial Assets:    
Cash and cash equivalents 203,588 681,286
Securities available-for-sale, at fair value 1,968  
Securities held-to-maturity 0  
Securities available-for-sale, at fair value   900
Real estate mortgages held-for-sale 0 0
Loans, net 0 0
Mortgage banking derivative 0 0
Interest rate swap derivative 0 0
Accrued interest receivable 0 0
Financial Liabilities:    
Certificates of deposit 0 0
All other deposits 4,913,829 4,905,889
Federal Home Loan Bank advances   0
Mortgage banking derivative 0 0
Interest rate swap derivative 0 0
Standby letters of credit 0 0
Accrued interest payable 184 84
Level 2 | Estimated Fair Value    
Financial Assets:    
Cash and cash equivalents 1,214 1,954
Securities available-for-sale, at fair value 1,186,899  
Securities held-to-maturity 103,326  
Securities available-for-sale, at fair value   1,395,615
Real estate mortgages held-for-sale 1,117 7,634
Loans, net 0 0
Mortgage banking derivative 83 398
Interest rate swap derivative 38,909 14,309
Accrued interest receivable 9,201 7,689
Financial Liabilities:    
Certificates of deposit 751,974 833,617
All other deposits 0 0
Federal Home Loan Bank advances   66,118
Mortgage banking derivative 0 2
Interest rate swap derivative 38,910 14,329
Standby letters of credit 0 0
Accrued interest payable 2,016 2,535
Level 3 | Estimated Fair Value    
Financial Assets:    
Cash and cash equivalents 0 0
Securities available-for-sale, at fair value 3,319  
Securities held-to-maturity 0  
Securities available-for-sale, at fair value   2,043
Real estate mortgages held-for-sale 0 0
Loans, net 4,246,842 4,144,000
Mortgage banking derivative 0 0
Interest rate swap derivative 0 0
Accrued interest receivable 13,621 9,985
Financial Liabilities:    
Certificates of deposit 0 0
All other deposits 0 0
Federal Home Loan Bank advances   0
Mortgage banking derivative 0 0
Interest rate swap derivative 0 0
Standby letters of credit 234 272
Accrued interest payable $ 0 $ 0