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Securities
 6 Months Ended
Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
Securities Securities 
The amortized cost, unrealized gross gains and losses recognized in accumulated other comprehensive income (loss), and fair value of Securities Available-for-Sale were as follows:
Securities Available-for-Sale:Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Allowance for Credit Losses Fair
Value
    
June 30, 2021    
Obligations of State and Political Subdivisions$701,326 $33,137 $(566)$— $733,897 
MBS/CMO704,460 7,283 (5,248)— 706,495 
US Gov't Sponsored Entities & Agencies145,258 344 (646)— 144,956 
Total$1,551,044 $40,764 $(6,460)$— $1,585,348 
December 31, 2020    
Obligations of State and Political Subdivisions$548,273 $33,077 $(103)$— $581,247 
MBS/CMO535,526 12,806 (25)— 548,307 
US Gov't Sponsored Entities & Agencies88,376 120 (198)— 88,298 
Total$1,172,175 $46,003 $(326)$— $1,217,852 
 
All mortgage-backed securities in the above table (identified above and throughout this Note 4 as "MBS/CMO") are residential and multi-family mortgage-backed securities and guaranteed by government sponsored entities. The US Gov't Sponsored Entities & Agencies in the above table have underlying collateral of equipment, machinery and commercial real estate.

The amortized cost and fair value of Securities at June 30, 2021 by contractual maturity are shown below. Expected maturities may differ from contractual maturities because some issuers have the right to call or prepay certain obligations with or without call or prepayment penalties. Mortgage-backed Securities are not due at a single maturity date and are shown separately.
Securities Available-for-Sale:Amortized
Cost		Fair
Value
Due in one year or less$3,913 $3,932 
Due after one year through five years17,534 18,232 
Due after five years through ten years67,849 72,725 
Due after ten years612,030 639,008 
MBS/CMO704,460 706,495 
US Gov't Sponsored Entities & Agencies145,258 144,956 
Total$1,551,044 $1,585,348 
  
Proceeds from the Sales of Securities are summarized below:
 Three Months EndedThree Months Ended
June 30, 2021June 30, 2020
Proceeds from Sales$15,378 $52,435 
Gross Gains on Sales300 993 
Income Taxes on Gross Gains63 209 
 Six Months EndedSix Months Ended
 June 30, 2021June 30, 2020
Proceeds from Sales$66,748 $63,424 
Gross Gains on Sales1,275 1,583 
Income Taxes on Gross Gains268 336 

The carrying value of securities pledged to secure repurchase agreements, public and trust deposits, and for other purposes as required by law was $202,540 and $237,506 as of June 30, 2021 and December 31, 2020, respectively.

Below is a summary of securities with unrealized losses as of June 30, 2021 and December 31, 2020, presented by length of time the securities have been in a continuous unrealized loss position:
 Less than 12 Months12 Months or MoreTotal
June 30, 2021Fair
Value		Unrealized
Loss		Fair
Value		Unrealized
Loss		Fair
Value		Unrealized
Loss
Obligations of State and Political Subdivisions$77,284 $(566)$— $— $77,284 $(566)
MBS/CMO327,140 (5,246)213 (2)327,353 (5,248)
US Gov't Sponsored Entities & Agencies82,189 (646)— — 82,189 (646)
Total$486,613 $(6,458)$213 $(2)$486,826 $(6,460)

 Less than 12 Months12 Months or MoreTotal
December 31, 2020Fair
Value		Unrealized
Loss		Fair
Value		Unrealized
Loss		Fair
Value		Unrealized
Loss
Obligations of State and Political Subdivisions$10,652 $(103)$— $— $10,652 $(103)
MBS/CMO19,631 (25)— — 19,631 (25)
US Gov't Sponsored Entities & Agencies59,054 (198)— — 59,054 (198)
Total$89,337 $(326)$— $— $89,337 $(326)

Available-for-sale debt securities in unrealized loss positions are evaluated for impairment related to credit losses at least quarterly. For available-for-sale debt securities in an unrealized loss position, the Company assesses whether we intend to sell, or it is more likely than not that we will be required to sell the security before recovery of its amortized cost basis. If either of the criteria regarding intent or requirement to sell is met, the security’s amortized cost basis is written down to fair value through income. For available-for sale debt securities that do not meet the criteria, the Company evaluates whether the decline in fair value has resulted from credit losses or other factors. In making this assessment, management considers the extent to which fair value is less than amortized cost, any changes to the rating of the security by a rating agency, and adverse conditions specifically related to the security and the issuer, among other factors. If this assessment indicates that a credit loss exists, we compare the present value of cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of cash flows expected to be collected is less than the amortized cost basis for the security, a credit loss exists and an allowance for credit losses is recorded, limited to the amount that the fair value of the security is less than its amortized cost basis. Any impairment that has not been recorded through an allowance for credit losses is recognized in other comprehensive income, net of applicable taxes. No allowance for credit losses for available-for-sale debt securities was needed at June 30, 2021 or December 31, 2020. Accrued interest receivable on available-for-sale debt securities totaled $7,224 at June 30, 2021 and $5,954 at December 31, 2020. Accrued interest receivable is excluded from the estimate of credit losses.

The Company's equity securities are listed as Other Investments on the Consolidated Balance Sheets and consist of one non-controlling investment in a single banking organization at June 30, 2021 and December 31, 2020. The original investment totaled $1,350 and other-than-temporary impairment was previously recorded totaling $997. The Company's equity securities are considered not to have readily determinable fair value and are carried at cost and evaluated for impairment. At June 30, 2021, there was no additional impairment recognized through earnings.