Quarterly report pursuant to Section 13 or 15(d)

FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details)

v3.22.2.2
FAIR VALUE MEASUREMENTS (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
ASSETS    
Securities available for sale, at fair value $ 2,717,323 $ 3,481,650
Loans held for sale, at fair value 12,889 20,861
Fair value hedges 4,511  
LIABILITIES    
Cash flow hedges 7,735  
Fair value hedges   5,387
Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale, at fair value 56,073 64,474
Loans held for sale, at fair value 0 0
Fair value hedges 0  
LIABILITIES    
Cash flow hedges 0  
Fair value hedges   0
Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale, at fair value 2,661,250 3,417,176
Loans held for sale, at fair value 12,889 20,861
Fair value hedges 4,511  
LIABILITIES    
Cash flow hedges 7,735  
Fair value hedges   5,387
Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale, at fair value 0 0
Loans held for sale, at fair value 0 0
Fair value hedges 0  
LIABILITIES    
Cash flow hedges 0  
Fair value hedges   0
Recurring    
ASSETS    
Loans held for sale, at fair value 12,889 20,861
Fair value hedges 4,511  
LIABILITIES    
Cash flow hedges 7,735  
Fair value hedges   5,387
Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Loans held for sale, at fair value 0 0
Fair value hedges 0  
LIABILITIES    
Cash flow hedges 0  
Fair value hedges   0
Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Loans held for sale, at fair value 12,889 20,861
Fair value hedges 4,511  
LIABILITIES    
Cash flow hedges 7,735  
Fair value hedges   5,387
Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Loans held for sale, at fair value 0 0
Fair value hedges 0  
LIABILITIES    
Cash flow hedges 0  
Fair value hedges   0
U.S. government and agency securities    
ASSETS    
Securities available for sale, at fair value 61,636 73,849
U.S. government and agency securities | Recurring    
ASSETS    
Securities available for sale, at fair value 61,636 73,849
U.S. government and agency securities | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale, at fair value 56,073 64,474
U.S. government and agency securities | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale, at fair value 5,563 9,375
U.S. government and agency securities | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale, at fair value 0 0
Obligations of states and political subdivisions    
ASSETS    
Securities available for sale, at fair value 764,543 1,008,396
Obligations of states and political subdivisions | Recurring    
ASSETS    
Securities available for sale, at fair value 764,543 1,008,396
Obligations of states and political subdivisions | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale, at fair value 0 0
Obligations of states and political subdivisions | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale, at fair value 764,543 1,008,396
Obligations of states and political subdivisions | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale, at fair value 0 0
Corporate and other bonds    
ASSETS    
Securities available for sale, at fair value 231,088 153,376
Corporate and other bonds | Recurring    
ASSETS    
Securities available for sale, at fair value 231,088 153,376
Corporate and other bonds | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale, at fair value 0 0
Corporate and other bonds | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale, at fair value 231,088 153,376
Corporate and other bonds | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale, at fair value 0 0
Mortgage-backed securities | Recurring    
ASSETS    
Securities available for sale, at fair value 1,658,402 2,244,389
Mortgage-backed securities | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale, at fair value 0 0
Mortgage-backed securities | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale, at fair value 1,658,402 2,244,389
Mortgage-backed securities | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale, at fair value 0 0
Other securities    
ASSETS    
Securities available for sale, at fair value 1,654 1,640
Other securities | Recurring    
ASSETS    
Securities available for sale, at fair value 1,654 1,640
Other securities | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Securities available for sale, at fair value 0 0
Other securities | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Securities available for sale, at fair value 1,654 1,640
Other securities | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Securities available for sale, at fair value 0 0
Interest Rate Swap    
ASSETS    
Interest rate swap 72,627 73,696
LIABILITIES    
Interest rate swap 242,969 49,051
Interest Rate Swap | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Interest rate swap 0 0
LIABILITIES    
Interest rate swap 0 0
Interest Rate Swap | Significant Other Observable Inputs Level 2    
ASSETS    
Interest rate swap 72,627 73,696
LIABILITIES    
Interest rate swap 242,969 49,051
Interest Rate Swap | Significant Unobservable Inputs Level 3    
ASSETS    
Interest rate swap 0 0
LIABILITIES    
Interest rate swap 0 0
Interest Rate Swap | Recurring    
ASSETS    
Interest rate swap 72,627 73,696
LIABILITIES    
Interest rate swap 242,969 49,051
Interest Rate Swap | Recurring | Quoted Prices in Active Markets for Identical Assets Level 1    
ASSETS    
Interest rate swap 0 0
LIABILITIES    
Interest rate swap 0 0
Interest Rate Swap | Recurring | Significant Other Observable Inputs Level 2    
ASSETS    
Interest rate swap 72,627 73,696
LIABILITIES    
Interest rate swap 242,969 49,051
Interest Rate Swap | Recurring | Significant Unobservable Inputs Level 3    
ASSETS    
Interest rate swap 0 0
LIABILITIES    
Interest rate swap $ 0 $ 0