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Accumulated Other Comprehensive Income (Loss) (Tables)
6 Months Ended
Jun. 30, 2021
Equity [Abstract]  
Summary of the components of accumulated other comprehensive income The following table summarizes the changes in AOCI by component for the:
Three Months Ended June 30
20212020
Unrealized
Gains
(Losses) on
AFS
Securities
Unrealized
Gains
(Losses) on Derivative Instruments
Defined
Benefit
Pension Plan
TotalUnrealized
Gains
(Losses) on
AFS
Securities
Unrealized
Gains
(Losses) on Derivative Instruments
Defined
Benefit
Pension Plan
Total
Balance, April 1$7,682 $(21)$(2,745)$4,916 $9,459 $(54)$(2,695)$6,710 
OCI before reclassifications988 27 — 1,015 2,059 (29)— 2,030 
Tax effect(201)(6)— (207)(379)— (373)
OCI, net of tax787 21 — 808 1,680 (23)— 1,657 
Balance, June 30$8,469 $ $(2,745)$5,724 $11,139 $(77)$(2,695)$8,367 
Six Months Ended June 30
20212020
Unrealized
Gains
(Losses) on
AFS
Securities
Unrealized
Gains
(Losses) on Derivative Instruments
Defined
Benefit
Pension Plan
TotalUnrealized
Gains
(Losses) on
AFS
Securities
Unrealized
Gains
(Losses) on Derivative Instruments
Defined
Benefit
Pension Plan
Total
Balance, January 1$10,485 $(42)$(2,745)$7,698 $4,612 $54 $(2,695)$1,971 
OCI before reclassifications(2,557)53 — (2,504)8,370 (165)— 8,205 
Amounts reclassified from AOCI— — — — (71)— — (71)
Subtotal(2,557)53 — (2,504)8,299 (165)— 8,134 
Tax effect541 (11)— 530 (1,772)34 — (1,738)
OCI, net of tax(2,016)42 — (1,974)6,527 (131)— 6,396 
Balance, June 30$8,469 $ $(2,745)$5,724 $11,139 $(77)$(2,695)$8,367 
A summary of the components of unrealized gains on AFS securities included in OCI follows for the:
Three Months Ended June 30
 20212020
Auction Rate Money Market Preferred StocksAll Other AFS SecuritiesTotalAuction Rate Money Market Preferred StocksAll Other AFS SecuritiesTotal
Unrealized gains (losses) arising during the period$36 $952 $988 $253 $1,806 $2,059 
Tax effect— (201)(201)— (379)(379)
Unrealized gains (losses), net of tax$36 $751 $787 $253 $1,427 $1,680 
 Six Months Ended June 30
 20212020
Auction Rate Money Market Preferred StocksAll Other AFS SecuritiesTotalAuction Rate Money Market Preferred StocksAll Other AFS SecuritiesTotal
Unrealized gains (losses) arising during the period$23 $(2,580)$(2,557)$(140)$8,510 $8,370 
Reclassification adjustment for net (gains) losses included in net income— — — — (71)(71)
Net unrealized gains (losses)23 (2,580)(2,557)(140)8,439 8,299 
Tax effect— 541 541 — (1,772)(1,772)
Unrealized gains (losses), net of tax$23 $(2,039)$(2,016)$(140)$6,667 $6,527