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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2021
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, 2021
 Level 1Level 2Level 3Total
 (in thousands)
Loans held for sale$ $43,123 $ $43,123 
Available for sale investment securities:
U.S. Government securities153,210   153,210 
U.S. Government sponsored agency securities 62,066  62,066 
State and municipal securities 1,150,394  1,150,394 
Corporate debt securities 369,338  369,338 
Collateralized mortgage obligations 252,035  252,035 
Residential mortgage-backed securities 190,123  190,123 
Commercial mortgage-backed securities 832,038  832,038 
Auction rate securities  75,133 75,133 
Total available for sale investment securities153,210 2,855,994 75,133 3,084,337 
Other assets:
Investments held in Rabbi Trust27,015   27,015 
Derivative assets319 190,480  190,799 
Total assets$180,544 $3,089,597 $75,133 $3,345,274 
Other liabilities:
Deferred compensation liabilities$27,015 $ $ $27,015 
Derivative liabilities297 97,036  97,333 
Total liabilities$27,312 $97,036 $ $124,348 
 December 31, 2020
 Level 1Level 2Level 3Total
 (in thousands)
Loans held for sale$— $83,886 $— $83,886 
Available for sale investment securities:
State and municipal securities— 952,613 — 952,613 
Corporate debt securities— 367,145 — 367,145 
Collateralized mortgage obligations— 503,766 — 503,766 
Residential mortgage-backed securities— 377,998 — 377,998 
Commercial mortgage-backed securities— 762,415 — 762,415 
Auction rate securities— — 98,206 98,206 
Total available for sale investment securities— 2,963,937 98,206 3,062,143 
Other assets:
Investments held in Rabbi Trust24,383 — — 24,383 
Derivative assets323 338,987 — 339,310 
Total assets$24,706 $3,386,810 $98,206 $3,509,722 
Other liabilities:
Deferred compensation liabilities$24,383 $— $— $24,383 
Derivative liabilities280 167,505 — 167,785 
Total liabilities$24,663 $167,505 $— $192,168 
Schedule of Changes in Assets and Liabilities Measured at Fair Value on a Recurring Basis using Level 3 Inputs
The following table presents the changes in the Corporation’s available for sale investment securities measured at fair value on a recurring basis using unobservable inputs (Level 3):
Single-issuer
Trust Preferred
Securities
ARCs
Three months ended September 30, 2021(in thousands)
Balance at June 30, 2021$ $74,834 
Unrealized adjustment to fair value (1)
 299 
Balance at September 30, 2021$ $75,133 
Three months ended September 30, 2020
Balance at June 30, 2020$— $100,859 
Sales— — 
Unrealized adjustment to fair value (1)
— (2,869)
Balance at September 30, 2020$— $97,990 
Nine months ended September 30, 2021
Balance at December 31, 2020$ $98,206 
Sales (24,619)
Unrealized adjustment to fair value (1)
 1,546 
Balance at September 30, 2021$ $75,133 
Nine months ended September 30, 2020
Balance at December 31, 2019$2,400 $101,926 
Sales(2,160)— 
Unrealized adjustment to fair value (1)
(242)(3,936)
Discount accretion— 
Balance at September 30, 2020$— $97,990 
(1)Pooled trust preferred securities, single-issuer trust preferred securities and 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 "available for sale 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:
 September 30, 2021December 31, 2020
 (in thousands)
Loans, net$113,261 $116,584 
OREO1,896 4,178 
MSRs (1)
32,938 28,245 
Total assets$148,095 $149,007 
(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 present the carrying amounts and estimated fair values of the Corporation’s financial instruments for the current period. A general description of the methods and assumptions used to estimate such fair values follows:
 September 30, 2021
Estimated Fair Value
Carrying AmountLevel 1Level 2Level 3Total
(in thousands)
FINANCIAL ASSETS
Cash and cash equivalents$2,471,009 $2,471,009 $ $ $2,471,009 
FRB and FHLB stock61,293  61,293  61,293 
Loans held for sale 43,123  43,123  43,123 
AFS securities 3,084,337 153,210 2,855,994 75,133 3,084,337 
HTM securities916,423  910,156  910,156 
Net Loans 18,012,680   17,434,206 17,434,206 
Accrued interest receivable57,902 57,902   57,902 
Other assets 517,140 291,826 190,480 34,834 517,140 
FINANCIAL LIABILITIES  
Demand and savings deposits$20,022,870 $20,022,870 $ $ $20,022,870 
Brokered deposits262,617 242,617 20,732  263,349 
Time deposits1,788,554  1,795,084  1,795,084 
Short-term borrowings468,967 468,967   468,967 
Accrued interest payable5,202 5,202   5,202 
Long-term borrowings627,386  614,866  614,866 
Other liabilities 325,361 213,542 97,036 14,783 325,361 

 
December 31, 2020
Estimated Fair Value
Carrying AmountLevel 1Level 2Level 3Total
(in thousands)
FINANCIAL ASSETS
Cash and cash equivalents$1,847,832 $1,847,832 $— $— $1,847,832 
FRB and FHLB stock92,129 — 92,129 — 92,129 
Loans held for sale83,886 — 83,886 — 83,886 
AFS securities3,062,143 — 2,963,937 98,206 3,062,143 
HTM securities278,281 — 296,857 — 296,857 
Net Loans18,623,253 — — 18,354,532 18,354,532 
Accrued interest receivable72,942 72,942 — — 72,942 
Other assets650,425 279,015 338,987 32,423 650,425 
FINANCIAL LIABILITIES
Demand and savings deposits$18,279,358 $18,279,358 $— $— $18,279,358 
Brokered deposits335,185 295,185 41,206 — 336,391 
Time deposits2,224,664 — 2,246,457 — 2,246,457 
Short-term borrowings630,066 630,066 — — 630,066 
Accrued interest payable10,365 10,365 — — 10,365 
Long-term borrowings1,296,263 — 1,332,041 — 1,332,041 
Other liabilities338,747 156,869 167,505 14,373 338,747