Annual report pursuant to Section 13 and 15(d)

PARENT COMPANY FINANCIAL INFORMATION (CONDENSED BALANCE SHEETS) (Details)

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PARENT COMPANY FINANCIAL INFORMATION (CONDENSED BALANCE SHEETS) (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
ASSETS        
Cash $ 802,501,000 $ 493,294,000    
Premises and equipment, net 134,808,000 163,829,000    
Other assets 413,706,000 514,121,000    
Total assets 20,064,796,000 19,628,449,000    
LIABILITIES AND STOCKHOLDERS' EQUITY        
Long-term borrowings 388,724,000 489,829,000    
Other liabilities 237,063,000 356,477,000    
Total liabilities 17,354,725,000 16,919,959,000    
Total stockholders' equity 2,710,071,000 2,708,490,000 $ 2,513,102,000 $ 1,924,581,000
Total liabilities and stockholders' equity 20,064,796,000 19,628,449,000    
Parent Company        
ASSETS        
Cash 105,464,000 116,748,000    
Premises and equipment, net 0 10,435,000    
Other assets 59,252,000 30,429,000    
Investment in subsidiaries 2,963,401,000 2,858,608,000    
Total assets 3,128,117,000 3,016,220,000    
LIABILITIES AND STOCKHOLDERS' EQUITY        
Long-term borrowings 246,895,000 148,806,000    
Trust preferred capital notes 141,829,000 141,023,000    
Other liabilities 29,322,000 17,901,000    
Total liabilities 418,046,000 307,730,000    
Total stockholders' equity 2,710,071,000 2,708,490,000    
Total liabilities and stockholders' equity $ 3,128,117,000 $ 3,016,220,000