XML 49 R34.htm IDEA: XBRL DOCUMENT
v3.20.4

Securities (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items] |
Amortized Cost and Fair Value of Debt Securities Available for Sale |
Securities Available for Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, 2020 |  |  | December 31, 2019 |
|  |  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |  |  |  |  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |  |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(in thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |  |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
U.S. Treasury and government agency securities |  | $ |  | 207,365 |  |  | $ |  | 6,289 |  |  | $ |  | 284 |  |  | $ |  | 213,370 |  |  | $ |  | 98,320 |  |  | $ |  | 652 |  |  | $ |  | 300 |  |  | $ |  | 98,672 |
Municipal obligations |  |  |  | 309,342 |  |  |  |  | 17,536 |  |  |  |  | 153 |  |  |  |  | 326,725 |  |  |  |  | 242,016 |  |  |  |  | 7,789 |  |  |  |  | — |  |  |  |  | 249,805 |
Residential mortgage-backed securities |  |  |  | 2,560,249 |  |  |  |  | 69,570 |  |  |  |  | 8 |  |  |  |  | 2,629,811 |  |  |  |  | 1,910,909 |  |  |  |  | 20,268 |  |  |  |  | 7,020 |  |  |  |  | 1,924,157 |
Commercial mortgage-backed securities |  |  |  | 2,323,306 |  |  |  |  | 135,516 |  |  |  |  | 3,288 |  |  |  |  | 2,455,534 |  |  |  |  | 1,570,765 |  |  |  |  | 19,880 |  |  |  |  | 4,178 |  |  |  |  | 1,586,467 |
Collateralized mortgage obligations |  |  |  | 354,472 |  |  |  |  | 7,651 |  |  |  |  | — |  |  |  |  | 362,123 |  |  |  |  | 807,600 |  |  |  |  | 3,757 |  |  |  |  | 3,142 |  |  |  |  | 808,215 |
Corporate debt securities |  |  |  | 11,500 |  |  |  |  | 264 |  |  |  |  | — |  |  |  |  | 11,764 |  |  |  |  | 8,000 |  |  |  |  | 21 |  |  |  |  | 33 |  |  |  |  | 7,988 |
|  | $ |  | 5,766,234 |  |  | $ |  | 236,826 |  |  | $ |  | 3,733 |  |  | $ |  | 5,999,327 |  |  | $ |  | 4,637,610 |  |  | $ |  | 52,367 |  |  | $ |  | 14,673 |  |  | $ |  | 4,675,304 |
Amortized Cost and Fair Value of Debt Securities Held to Maturity |
Securities Held to Maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, 2020 |  |  | December 31, 2019 |
|  |  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |  |  |  |  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |  |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(in thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |  |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
U.S. Treasury and government agency securities |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | 50,000 |  |  | $ |  | 3 |  |  | $ |  | — |  |  | $ |  | 50,003 |
Municipal obligations |  |  |  | 627,019 |  |  |  |  | 51,408 |  |  |  |  | 2 |  |  |  |  | 678,425 |  |  |  |  | 641,019 |  |  |  |  | 27,146 |  |  |  |  | 69 |  |  |  |  | 668,096 |
Residential mortgage-backed securities |  |  |  | 21,951 |  |  |  |  | 1,469 |  |  |  |  | — |  |  |  |  | 23,420 |  |  |  |  | 29,687 |  |  |  |  | 883 |  |  |  |  | — |  |  |  |  | 30,570 |
Commercial mortgage-backed securities |  |  |  | 549,686 |  |  |  |  | 54,587 |  |  |  |  | — |  |  |  |  | 604,273 |  |  |  |  | 539,371 |  |  |  |  | 12,474 |  |  |  |  | 581 |  |  |  |  | 551,264 |
Collateralized mortgage obligations |  |  |  | 158,514 |  |  |  |  | 2,949 |  |  |  |  | — |  |  |  |  | 161,463 |  |  |  |  | 307,932 |  |  |  |  | 3,597 |  |  |  |  | 458 |  |  |  |  | 311,071 |
|  | $ |  | 1,357,170 |  |  | $ |  | 110,413 |  |  | $ |  | 2 |  |  | $ |  | 1,467,581 |  |  | $ |  | 1,568,009 |  |  | $ |  | 44,103 |  |  | $ |  | 1,108 |  |  | $ |  | 1,611,004 |
Proceeds from Gross Gains on and Gross Losses on Sale of Securities | The following table presents the proceeds from, gross gains on, and gross losses on sales of securities during the years ended December 31, 2020, 2019 and 2018:
|  | Years Ended December 31, |
(in thousands) |  | 2020 |  |  | 2019 |  |  | 2018 |
Proceeds |  | $ | 211,919 |  |  | $ | 268,413 |  |  | $ | 455,162 |
Gross gains |  |  | 1,984 |  |  |  | — |  |  |  | — |
Gross losses |  |  | 1,496 |  |  |  | — |  |  |  | 25,480 |
Available for Sale Securities [Member] |
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items] |
Amortized Cost and Fair Value of Debt Securities by Contractual Maturity |
(in thousands) |  | Amortized Cost |  |  | Fair Value |
Debt Securities Available for Sale |  |  |  |  |  |  |  |  |  |
Due in one year or less |  | $ |  | 3,810 |  |  | $ |  | 3,810 |
Due after one year through five years |  |  |  | 240,883 |  |  |  |  | 260,170 |
Due after five years through ten years |  |  |  | 2,457,451 |  |  |  |  | 2,587,529 |
Due after ten years |  |  |  | 3,064,090 |  |  |  |  | 3,147,818 |
Total available for sale debt securities |  | $ |  | 5,766,234 |  |  | $ |  | 5,999,327 |
Securities with Unrealized Losses |
Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Losses < 12 Months |  |  | Losses 12 Months or > |  |  | Total |
|  |  |  |  |  |  | Gross |  |  |  |  |  |  |  | Gross |  |  |  |  |  |  |  | Gross |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(in thousands) |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. Treasury and government agency securities |  | $ |  | 35,845 |  |  | $ |  | 284 |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | 35,845 |  |  | $ |  | 284 |
Municipal obligations |  |  |  | 30,170 |  |  |  |  | 153 |  |  |  |  | — |  |  |  |  | — |  |  |  |  | 30,170 |  |  |  |  | 153 |
Residential mortgage-backed securities |  |  |  | 530 |  |  |  |  | 2 |  |  |  |  | 760 |  |  |  |  | 6 |  |  |  |  | 1,290 |  |  |  |  | 8 |
Commercial mortgage-backed securities |  |  |  | 446,190 |  |  |  |  | 3,288 |  |  |  |  | — |  |  |  |  | — |  |  |  |  | 446,190 |  |  |  |  | 3,288 |
Collateralized mortgage obligations |  |  |  | 70 |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | 70 |  |  |  |  | — |
Corporate debt securities |  |  |  | 2,000 |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | 2,000 |  |  |  |  | — |
. |  | $ |  | 514,805 |  |  | $ |  | 3,727 |  |  | $ |  | 760 |  |  | $ |  | 6 |  |  | $ |  | 515,565 |  |  | $ |  | 3,733 |
Available for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Losses < 12 Months |  |  | Losses 12 Months or > |  |  | Total |
|  |  |  |  |  |  | Gross |  |  |  |  |  |  |  | Gross |  |  |  |  |  |  |  | Gross |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(in thousands) |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. Treasury and government agency securities |  | $ |  | 28,235 |  |  | $ |  | 300 |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | 28,235 |  |  | $ |  | 300 |
Municipal obligations |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |
Residential mortgage-backed securities |  |  |  | 420,066 |  |  |  |  | 5,042 |  |  |  |  | 399,787 |  |  |  |  | 1,978 |  |  |  |  | 819,853 |  |  |  |  | 7,020 |
Commercial mortgage-backed securities |  |  |  | 458,855 |  |  |  |  | 3,971 |  |  |  |  | 14,896 |  |  |  |  | 207 |  |  |  |  | 473,751 |  |  |  |  | 4,178 |
Collateralized mortgage obligations |  |  |  | 89,689 |  |  |  |  | 1,315 |  |  |  |  | 184,389 |  |  |  |  | 1,827 |  |  |  |  | 274,078 |  |  |  |  | 3,142 |
Corporate debt securities |  |  |  | 1,467 |  |  |  |  | 33 |  |  |  |  | — |  |  |  |  | — |  |  |  |  | 1,467 |  |  |  |  | 33 |
|  | $ |  | 998,312 |  |  | $ |  | 10,661 |  |  | $ |  | 599,072 |  |  | $ |  | 4,012 |  |  | $ |  | 1,597,384 |  |  | $ |  | 14,673 |
Held-to-maturity Securities [Member] |
Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items] |
Amortized Cost and Fair Value of Debt Securities by Contractual Maturity |
(in thousands) |  | Amortized Cost |  |  | Fair Value |
Debt Securities Held to Maturity |  |  |  |  |  |  |  |  |  |
Due in one year or less |  | $ |  | 2,192 |  |  | $ |  | 2,190 |
Due after one year through five years |  |  |  | 204,134 |  |  |  |  | 218,501 |
Due after five years through ten years |  |  |  | 636,268 |  |  |  |  | 702,412 |
Due after ten years |  |  |  | 514,576 |  |  |  |  | 544,478 |
Total held to maturity debt securities |  | $ |  | 1,357,170 |  |  | $ |  | 1,467,581 |
Securities with Unrealized Losses |
Held to maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Losses < 12 Months |  |  | Losses 12 Months or > |  |  | Total |
|  |  |  |  |  |  | Gross |  |  |  |  |  |  |  | Gross |  |  |  |  |  |  |  | Gross |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(in thousands) |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. Treasury and government agency securities |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | — |
Municipal obligations |  |  |  | — |  |  |  |  | — |  |  |  |  | 2,381 |  |  |  |  | 2 |  |  |  |  | 2,381 |  |  |  |  | 2 |
Residential mortgage-backed securities |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |
Commercial mortgage-backed securities |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |
Collateralized mortgage obligations |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |
|  | $ |  | — |  |  | $ |  | — |  |  | $ |  | 2,381 |  |  | $ |  | 2 |  |  | $ |  | 2,381 |  |  | $ |  | 2 |
Held to maturity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Losses < 12 Months |  |  | Losses 12 Months or > |  |  | Total |
|  |  |  |  |  |  | Gross |  |  |  |  |  |  |  | Gross |  |  |  |  |  |  |  | Gross |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
(in thousands) |  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
U.S. Treasury and government agency securities |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | — |  |  | $ |  | — |
Municipal obligations |  |  |  | 4,735 |  |  |  |  | 38 |  |  |  |  | 3,143 |  |  |  |  | 31 |  |  |  |  | 7,878 |  |  |  |  | 69 |
Residential mortgage-backed securities |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |  |  |  |  | — |
Commercial mortgage-backed securities |  |  |  | 28,426 |  |  |  |  | 581 |  |  |  |  | — |  |  |  |  | — |  |  |  |  | 28,426 |  |  |  |  | 581 |
Collateralized mortgage obligations |  |  |  | — |  |  |  |  | — |  |  |  |  | 49,110 |  |  |  |  | 458 |  |  |  |  | 49,110 |  |  |  |  | 458 |
|  | $ |  | 33,161 |  |  | $ |  | 619 |  |  | $ |  | 52,253 |  |  | $ |  | 489 |  |  | $ |  | 85,414 |  |  | $ |  | 1,108 |

X
- Definition Tabular disclosure of information about investment in debt security measured at amortized cost (held-to-maturity). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5B -URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269825-111563 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5A -URI http://asc.fasb.org/extlink&oid=121645371&loc=SL120269820-111563 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27232-111563 + Details
Name: | us-gaap_HeldToMaturitySecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
Name: | us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAvailableForSaleSecuritiesReconciliationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfGainLossOnInvestmentsIncludingMarketableSecuritiesAndInvestmentsHeldAtCostIncomeStatementReportedAmountsSummaryLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the proceeds from sales of available-for-sale securities and the gross realized gains and gross realized losses that have been included in earnings as a result of those sales. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27357-111563 + Details
Name: | us-gaap_ScheduleOfRealizedGainLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563 + Details
Name: | us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InformationByCategoryOfDebtSecurityAxis=us-gaap_AvailableforsaleSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InformationByCategoryOfDebtSecurityAxis=us-gaap_HeldtomaturitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |