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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis The following tables present assets and liabilities measured at fair value on a recurring basis and reported on the consolidated balance sheets:
 September 30, 2023
 Level 1Level 2Level 3Total
 (dollars in thousands)
Loans held for sale$ $20,368 $ $20,368 
Available for sale investment securities:
U.S. Government securities222,446   222,446 
U.S. Government-sponsored agency securities 987  987 
State and municipal securities 949,146  949,146 
Corporate debt securities 428,484  428,484 
Collateralized mortgage obligations 112,217  112,217 
Residential mortgage-backed securities 189,275  189,275 
Commercial mortgage-backed securities 516,313  516,313 
Total available for sale investment securities222,446 2,196,422  2,418,868 
Other assets:
Investments held in Rabbi Trust27,116   27,116 
Derivative assets1,295 228,782  230,077 
Total assets$250,857 $2,445,572 $ $2,696,429 
Other liabilities:
Deferred compensation liabilities$27,116 $ $ $27,116 
Derivative liabilities1,080 372,529  373,609 
Total liabilities$28,196 $372,529 $ $400,725 

 December 31, 2022
 Level 1Level 2Level 3Total
 (dollars in thousands)
Loans held for sale$— $7,264 $— $7,264 
Available for sale investment securities:
U.S. Government securities218,485 — — 218,485 
U.S. Government sponsored agency securities— 1,008 — 1,008 
State and municipal securities— 1,105,712 — 1,105,712 
Corporate debt securities— 422,309 — 422,309 
Collateralized mortgage obligations— 134,033 — 134,033 
Residential mortgage-backed securities— 212,698 — 212,698 
Commercial mortgage-backed securities— 552,522 — 552,522 
Total available for sale investment securities218,485 2,428,282 — 2,646,767 
Other assets:
Investments held in Rabbi Trust23,435 — — 23,435 
Derivative assets672 166,796 — 167,468 
Total assets$242,592 $2,602,342 $— $2,844,934 
Other liabilities:
Deferred compensation liabilities$23,435 $— $— $23,435 
Derivative liabilities584 296,465 — 297,049 
Total liabilities$24,019 $296,465 $— $320,484 
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis The following table presents Level 3 financial assets measured at fair value on a nonrecurring basis:
 September 30,
2023
December 31,
2022
 (dollars in thousands)
Loans, net$90,359 $121,115 
OREO2,549 5,790 
MSRs(1)
51,523 50,044 
Total assets$144,431 $176,949 
(1) Amounts shown are estimated fair value. MSRs are recorded on the Corporation's consolidated balance sheets at the lower of amortized cost or fair value.
See "Note 6 - Mortgage Servicing Rights" for additional information.
Details of Book Value and Fair Value of Financial Instruments
The following tables detail the book values and the estimated fair values of the Corporation's financial instruments as of September 30, 2023 and December 31, 2022:
 September 30, 2023
Estimated Fair Value
Carrying AmountLevel 1Level 2Level 3Total
(dollars in thousands)
FINANCIAL ASSETS
Cash and cash equivalents$420,460 $420,460 $ $ $420,460 
FRB and FHLB stock106,363  106,363  106,363 
Loans held for sale 20,368  20,368  20,368 
AFS securities 2,418,868 222,446 2,196,422  2,418,868 
HTM securities1,279,733  1,019,844  1,019,844 
Loans, net20,884,769   19,508,510 19,508,510 
Accrued interest receivable101,624 101,624   101,624 
Other assets 734,736 451,882 228,782 54,072 734,736 
FINANCIAL LIABILITIES  
Demand and savings deposits$18,040,590 $18,040,590 $ $ $18,040,590 
Brokered deposits941,059 143,238 795,500  938,738 
Time deposits2,439,940  2,421,009  2,421,009 
Accrued interest payable26,848 26,848   26,848 
Federal funds purchased544,000 543,995   543,995 
Federal Home Loan Bank advances730,000 736,030   736,030 
Senior debt and subordinated debt540,174  449,078  449,078 
Other borrowings555,938 554,986 924  555,910 
Other liabilities 560,431 171,792 372,529 16,110 560,431 

December 31, 2022
Estimated Fair Value
Carrying AmountLevel 1Level 2Level 3Total
(dollars in thousands)
FINANCIAL ASSETS
Cash and cash equivalents$681,921 $681,921 $— $— $681,921 
FRB and FHLB stock130,186 — 130,186 — 130,186 
Loans held for sale7,264 — 7,264 — 7,264 
AFS securities2,646,767 218,485 2,428,282 — 2,646,767 
HTM securities1,321,256 — 1,125,049 — 1,125,049 
Loans, net20,010,181 — — 18,862,701 18,862,701 
Accrued interest receivable91,579 91,579 — — 91,579 
Other assets642,049 419,419 166,796 55,834 642,049 
FINANCIAL LIABILITIES
Demand and savings deposits$18,851,912 $18,851,912 $— $— $18,851,912 
Brokered deposits208,416 188,416 25,085 — 213,501 
Time deposits1,589,210 — 1,574,747 — 1,574,747 
Accrued interest payable10,185 10,185 — — 10,185 
Federal funds purchased191,000 190,998 — — 190,998 
Federal Home Loan Bank advances1,250,000 1,249,629 — — 1,249,629 
Senior debt and subordinated debt539,634 — 456,867 — 456,867 
Other borrowings890,573 889,393 1,180 — 890,573 
Other liabilities467,705 154,912 296,465 16,328 467,705