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Fair Value Measurements
6 Months Ended
Jun. 30, 2021
Fair Value Disclosures [Abstract]  
Fair Value Measurements FAIR VALUE MEASUREMENTS
The following table summarizes financial instruments measured at fair value on a recurring basis segregated by the level of the valuation inputs within the fair value hierarchy utilized to measure fair value:
 
 June 30, 2021
(in thousands)Quoted Prices in
Active Markets
for Identical Assets
(Level 1)
Significant
Other
Observable Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Total Fair
Value
Assets    
Securities available for sale    
Obligations of U.S. Government-sponsored enterprises$— $99,254 $— $99,254 
Obligations of states and political subdivisions— 480,845 — 480,845 
Agency mortgage-backed securities— 477,379 — 477,379 
U.S. Treasury bills— 11,346 — 11,346 
Corporate debt securities— 15,399 — 15,399 
Total securities available for sale— 1,084,223 — 1,084,223 
Derivatives— 19,809 — 19,809 
Total assets$— $1,104,032 $— $1,104,032 
Liabilities    
Derivatives$— $24,225 $— $24,225 
Total liabilities$— $24,225 $— $24,225 

December 31, 2020
(in thousands)Quoted Prices in
Active Markets
for Identical Assets
(Level 1)
Significant
Other
Observable Inputs
(Level 2)
Significant
Unobservable
Inputs
(Level 3)
Total Fair
Value
Assets    
Securities available for sale    
Obligations of U.S. Government-sponsored enterprises$— $15,161 $— $15,161 
Obligations of states and political subdivisions— 344,232 — 344,232 
Residential mortgage-backed securities— 526,572 — 526,572 
Corporate debt securities— 14,998 — 14,998 
U.S. Treasury bills— 11,466 — 11,466 
Total securities available-for-sale— 912,429 — 912,429 
Derivative financial instruments— 28,703 — 28,703 
Total assets$— $941,132 $— $941,132 
Liabilities    
Derivatives$— $34,967 $— $34,967 
Total liabilities$— $34,967 $— $34,967 

From time to time, the Company measures certain assets at fair value on a nonrecurring basis. These include assets measured at the lower of cost or fair value that were recognized at fair value below cost at the end of the period. At June 30, 2021, no assets were measured on a nonrecurring basis.
Following is a summary of the carrying amounts and fair values of certain financial instruments:
 June 30, 2021December 31, 2020
(in thousands)Carrying AmountEstimated fair valueLevelCarrying AmountEstimated fair valueLevel
Balance sheet assets    
Securities held-to-maturity, net$450,665 $470,099 Level 2$487,610 $501,523 Level 2
Other investments50,959 50,959 Level 248,764 48,764 Level 2
Loans held for sale5,763 5,763 Level 213,564 13,564 Level 2
Loans, net7,098,082 7,093,710 Level 37,088,264 7,067,562 Level 3
State tax credits, held for sale34,710 38,629 Level 336,853 39,925 Level 3
Balance sheet liabilities    
Certificates of deposit$514,334 $515,877 Level 3$550,095 $553,946 Level 3
Subordinated debentures and notes203,940 193,136 Level 2203,637 192,889 Level 2
FHLB advances50,000 51,591 Level 250,000 51,871 Level 2
Other borrowings and notes payable234,509 234,509 Level 2301,081 301,081 Level 2

For information regarding the methods and assumptions used to estimate the fair value of each class of financial instruments refer to Note 19 – Fair Value Measurements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, as filed with the SEC.