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Accumulated Other Comprehensive Income (Loss) (Tables)
9 Months Ended
Sep. 30, 2021
Equity [Abstract]  
Changes in other comprehensive income (loss)
The following table presents other comprehensive income(loss):
Before-Tax AmountTax EffectNet of Tax Amount
Three months ended September 30, 2021(in thousands)
Unrealized loss on securities$(27,975)$6,353 $(21,622)
Reclassification adjustment for securities gains included in net income (1)
   
Amortization of net unrealized losses on AFS securities transferred to HTM (2)
824 (187)637 
Net unrealized losses on interest rate swaps used in cash flow hedges (3)
(1,153)262 (891)
Amortization of net unrecognized pension and postretirement items (4)
371 (81)290 
Total OCI$(27,933)$6,347 $(21,586)
Three months ended September 30, 2020
Unrealized gain on securities$5,565 $(1,232)$4,333 
Reclassification adjustment for securities gains included in net income (1)
(2)(1)
Amortization of net unrealized losses on AFS securities transferred to HTM (2)
1,192 (264)928 
Amortization of net unrecognized pension and postretirement items (4)
329 (73)255 
Total OCI$7,083 $(1,568)$5,515 
Nine months ended September 30, 2021
Unrealized loss on securities$(20,796)$4,723 $(16,073)
Reclassification adjustment for securities gains included in net income (1)
(33,511)7,610 (25,901)
Amortization of net unrealized losses on AFS securities transferred to HTM (2)
2,787 (633)2,154 
Net unrealized gain on interest rate swaps used in cash flow hedges (3)
(678)154 (524)
Amortization of net unrecognized pension and postretirement items (3)
1,111 (243)868 
Total OCI$(51,087)$11,611 $(39,476)
Nine months ended September 30, 2020
Unrealized gain on securities (4)
$72,146 $(15,960)$56,186 
Reclassification adjustment for securities gains included in net income (1)
(3,053)676 (2,377)
Amortization of net unrealized losses on AFS securities transferred to HTM (2)
3,232 (715)2,517 
Amortization of net unrecognized pension and postretirement items (3)
984 (219)765 
Total OCI$73,309 $(16,218)$57,091 

(1)    Amounts reclassified out of AOCI. Before-tax amounts included in "Investment securities gains, net" on the Consolidated Statements of Income. See Note 3, "Investment Securities," for additional details.
(2)    Amounts reclassified out of AOCI. Before-tax amounts included as a reduction to "Interest Income" on the Consolidated Statements of Income.
(3)    Amounts reclassified out of AOCI. Before-tax amounts included in "Interest Income" on the Consolidated Statements of Income.
(4)    Amounts reclassified out of AOCI. Before-tax amounts included in "Salaries and employee benefits" on the Consolidated Statements of Income. See Note 12, "Employee Benefit Plans," for additional details.
Changes in each component of accumulated other comprehensive income (loss)
The following table presents changes in each component of accumulated other comprehensive income (loss), net of tax:
Unrealized Gains (Losses) on Investment SecuritiesNet Unrealized (Loss) Gain on Interest Rate Swaps used in Cash Flow HedgesUnrecognized Pension and Postretirement Plan Income (Costs)Total
(in thousands)
Three months ended September 30, 2021
Balance at June 30, 2021$62,769 $367 $(15,935)$47,201 
OCI before reclassifications(21,622)  (21,622)
Amounts reclassified from AOCI (891)290 (601)
Amortization of net unrealized losses on AFS securities transferred to HTM637   637 
Balance at September 30, 2021$41,784 $(524)$(15,645)$25,615 
Three months ended September 30, 2020
Balance at June 30, 2020$65,930 $— $(14,491)$51,439 
OCI before reclassifications4,333 — — 4,333 
Amounts reclassified from AOCI— — 255 255 
Amortization of net unrealized losses on AFS securities transferred to HTM928 — — 928 
Balance at September 30, 2020$71,190 $— $(14,236)$56,954 
Nine months ended September 30, 2021
Balance at December 31, 2020$81,604 $ $(16,513)$65,091 
OCI before reclassifications(16,073)  (16,073)
Amounts reclassified from AOCI(25,901)(524)868 (25,557)
Amortization of net unrealized losses on AFS securities transferred to HTM
2,154   2,154 
Balance at September 30, 2021$41,784 $(524)$(15,645)$25,615 
Nine months ended September 30, 2020
Balance at December 31, 2019$14,864 $— $(15,001)$(137)
OCI before reclassifications56,186 — — 56,186 
Amounts reclassified from AOCI(2,377)— 765 (1,612)
Amortization of net unrealized losses on AFS securities transferred to HTM2,517 — — 2,517 
Balance at September 30, 2020$71,190 $— $(14,236)$56,954