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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2022
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:
 March 31, 2022
 Level 1Level 2Level 3Total
 (in thousands)
Loans held for sale$ $27,675 $ $27,675 
Available for sale investment securities:
U.S. Government securities373,717   373,717 
State and municipal securities 1,144,646  1,144,646 
Corporate debt securities 395,597  395,597 
Collateralized mortgage obligations 171,264  171,264 
Residential mortgage-backed securities 275,602  275,602 
Commercial mortgage-backed securities 963,507  963,507 
Total available for sale investment securities373,717 2,950,616  3,324,333 
Other assets:
Investments held in Rabbi Trust27,065   27,065 
Derivative assets411 65,132  65,543 
Total assets$401,193 $3,043,423 $ $3,444,616 
Other liabilities:
Deferred compensation liabilities$27,065 $ $ $27,065 
Derivative liabilities357 89,976  90,333 
Total liabilities$27,422 $89,976 $ $117,398 
 December 31, 2021
 Level 1Level 2Level 3Total
 (in thousands)
Loans held for sale$— $35,768 $— $35,768 
Available for sale investment securities:
U.S. Government securities127,618 — — 127,618 
State and municipal securities— 1,188,670 — 1,188,670 
Corporate debt securities— 386,133 — 386,133 
Collateralized mortgage obligations— 209,359 — 209,359 
Residential mortgage-backed securities— 229,795 — 229,795 
Commercial mortgage-backed securities— 971,148 — 971,148 
Auction rate securities— — 74,667 74,667 
Total available for sale investment securities127,618 2,985,105 74,667 3,187,390 
Other assets:
Investments held in Rabbi Trust28,619 — — 28,619 
Derivative assets298 160,945 — 161,243 
Total assets$156,535 $3,181,818 $74,667 $3,413,020 
Other liabilities:
Deferred compensation liabilities$28,619 $— $— $28,619 
Derivative liabilities291 86,110 — 86,401 
Total liabilities$28,910 $86,110 $— $115,020 
Schedule of Changes in Assets and Liabilities Measured at Fair Value on a Recurring Basis using Level 3 Inputs
The following table presents the changes in the Corporation’s available for sale investment securities measured at fair value on a recurring basis using unobservable inputs (Level 3):
ARCs
Three months ended March 31, 2022(in thousands)
Balance at December 31, 2021$74,667 
Sales (74,823)
Unrealized adjustment to fair value (1)
156 
Balance at March 31, 2022$ 
Three months ended March 31, 2021
Balance at December 31, 2020$98,206 
Sales(24,619)
Unrealized adjustment to fair value (1)
2,617 
Balance at March 31, 2021$76,204 
(1)ARCs are classified as available for sale investment securities; as such, the unrealized adjustment to fair value was recorded as an unrealized holding gain (loss) and included as a component of "AFS at estimated fair value" on the consolidated balance sheets.
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:
 March 31, 2022December 31, 2021
 (in thousands)
Loans, net$113,034 $118,458 
OREO2,014 1,817 
MSRs (1)
47,609 35,393 
Total assets$162,657 $155,668 
(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 5 - 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 March 31, 2022 and December 31, 2021.
 March 31, 2022
Estimated Fair Value
Carrying AmountLevel 1Level 2Level 3Total
(in thousands)
FINANCIAL ASSETS
Cash and cash equivalents$1,157,965 $1,157,965 $ $ $1,157,965 
FRB and FHLB stock57,729  57,729  57,729 
Loans held for sale 27,675  27,675  27,675 
AFS securities 3,324,333 373,717 2,950,616  3,324,333 
HTM securities964,341  888,989  888,989 
Net loans 18,232,414   17,588,031 17,588,031 
Accrued interest receivable55,102 55,102   55,102 
Other assets 478,961 364,206 65,132 49,623 478,961 
FINANCIAL LIABILITIES  
Demand and savings deposits$19,632,873 $19,632,873 $ $ $19,632,873 
Brokered deposits248,833 228,833 20,514  249,347 
Time deposits1,659,468  1,657,129  1,657,129 
Accrued interest payable4,713 4,713   4,713 
Short-term borrowings452,440 452,440   452,440 
Long-term borrowings556,494  509,423  509,423 
Other liabilities 299,695 195,786 89,976 13,933 299,695 

December 31, 2021
Estimated Fair Value
Carrying AmountLevel 1Level 2Level 3Total
(in thousands)
FINANCIAL ASSETS
Cash and cash equivalents$1,638,614 $1,638,614 $— $— $1,638,614 
FRB and FHLB stock57,635 — 57,635 — 57,635 
Loans held for sale35,768 — 35,768 — 35,768 
AFS securities3,187,390 127,618 2,985,105 74,667 3,187,390 
HTM securities980,384 — 965,867 — 965,867 
Net loans18,076,349 — — 17,519,497 17,519,497 
Accrued interest receivable57,451 57,451 — — 57,451 
Other assets565,491 367,336 160,945 37,210 565,491 
FINANCIAL LIABILITIES
Demand and savings deposits$19,594,497 $19,594,497 $— $— $19,594,497 
Brokered deposits251,526 231,526 20,603 — 252,129 
Time deposits1,727,476 — 1,730,673 — 1,730,673 
Accrued interest payable7,000 7,000 — — 7,000 
Short-term borrowings416,764 416,764 — — 416,764 
Long-term borrowings621,345 — 605,719 — 605,719 
Other liabilities288,862 188,219 86,110 14,533 288,862