v3.21.2

SECURITIES (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2021
SECURITIES |
Summary of AFS Securities Portfolio | The following table provides a summary of the Company’s securities AFS portfolio as of: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortized | ​ | Gross Unrealized | ​ | Allowance for | ​ | Estimated
(dollars in thousands) | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Credit Losses | ​ | Fair Value
September 30, 2021: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities | ​ | $ | 749,029 | ​ | $ | 9,914 | ​ | $ | (1,001) | ​ | $ | — | ​ | $ | 757,942
Beneficial interests in FHLMC securitization | ​ |  | 22,764 | ​ |  | 479 | ​ |  | — | ​ |  | (10,098) | ​ |  | 13,145
Corporate bonds | ​ |  | 114,000 | ​ |  | 3,034 | ​ |  | (123) | ​ |  | — | ​ |  | 116,911
Other | ​ |  | 3,561 | ​ |  | 91 | ​ |  | (2) | ​ |  | — | ​ |  | 3,650
Total | ​ | $ | 889,354 | ​ | $ | 13,518 | ​ | $ | (1,126) | ​ | $ | (10,098) | ​ | $ | 891,648
December 31, 2020: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities | ​ | $ | 705,752 | ​ | $ | 18,243 | ​ | $ | — | ​ | $ | — | ​ | $ | 723,995
Beneficial interests in FHLMC securitization | ​ |  | 30,497 | ​ |  | 211 | ​ |  | — | ​ |  | (7,245) | ​ |  | 23,463
Corporate bonds | ​ |  | 57,000 | ​ |  | 1,358 | ​ |  | — | ​ |  | — | ​ |  | 58,358
Other | ​ |  | 1,512 | ​ |  | 98 | ​ |  | — | ​ |  | — | ​ |  | 1,610
Total | ​ | $ | 794,761 | ​ | $ | 19,910 | ​ | $ | — | ​ | $ | (7,245) | ​ | $ | 807,426
Schedule of Securities in a Continuous Unrealized Loss Position Aggregated by Investment Category and Length of Time | The table below indicates, as of September 30, 2021, the gross unrealized losses and fair values of our investments, aggregated by investment category and length of time that the individual securities have been in a continuous unrealized loss position. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Securities with Unrealized Loss at September 30, 2021
​ | ​ | Less than 12 months | ​ | 12 months or more | ​ | Total
​ | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized
(dollars in thousands) |  | Value |  | Loss |  | Value |  | Loss |  | Value |  | Loss
Agency mortgage-backed securities | ​ | $ | 86,766 | ​ | $ | (1,001) | ​ | $ | — | ​ | $ | — | ​ | $ | 86,766 | ​ | $ | (1,001)
Corporate bonds | ​ | ​ | 19,877 | ​ | ​ | (123) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 19,877 | ​ | ​ | (123)
Other | ​ | ​ | 497 | ​ | ​ | (2) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 497 | ​ | ​ | (2)
Total temporarily impaired securities | ​ | $ | 107,140 | ​ | $ | (1,126) | ​ | $ | — | ​ | $ | — | ​ | $ | 107,140 | ​ | $ | (1,126)
​
Summary of Allowance For Credit Losses - Securities AFS | ​
​ | ​ | ​ | ​
(dollars in thousands) | ​ | ​ | Total
​ | ​ | ​ | ​
Three Months Ended September 30, 2021: | ​ | ​ | ​
Beginning balance |  | $ | 9,116
Provision for credit losses |  | ​ | 982
Balance: September 30, 2021 |  | $ | 10,098
​ | ​ | ​ | ​
Nine Months Ended September 30, 2021: | ​ | ​ | ​
Beginning balance |  | $ | 7,245
Provision for credit losses |  | ​ | 2,853
Balance: September 30, 2021 |  | $ | 10,098
​ | ​ | ​ | ​
Year Ended December 31, 2020: | ​ | ​ | ​
Beginning balance |  | $ | —
Provision for credit losses |  | ​ | 7,245
Balance: December 31, 2020 |  | $ | 7,245
Scheduled Maturities of Securities AFS Other than Mortgage Backed Securities and the Related Weighted Average Yield | The scheduled maturities of securities AFS and the related weighted average yields were as follows for the periods indicated: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Less than |  | 1 Through |  | 5 Through |  | After |  | ​ | ​ |
(dollars in thousands) | ​ | 1 Year | ​ | 5 years | ​ | 10 Years | ​ | 10 Years | ​ | Total |
September 30, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amortized Cost: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Corporate bonds | ​ | $ | — | ​ | $ | — | ​ | $ | 109,000 | ​ | $ | 5,000 | ​ | $ | 114,000 | ​
Other | ​ |  | — | ​ |  | 1,533 | ​ |  | 2,028 | ​ |  | — | ​ |  | 3,561 | ​
Total | ​ | $ | — | ​ | $ | 1,533 | ​ | $ | 111,028 | ​ | $ | 5,000 | ​ | $ | 117,561 | ​
Weighted average yield | ​ |  | — | % |  | 2.03 | % |  | 4.37 | % |  | 3.38 | % |  | 4.30 | %
Estimated Fair Value: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Corporate bonds | ​ | $ | — | ​ | $ | — | ​ | $ | 111,811 | ​ | $ | 5,100 | ​ | $ | 116,911 | ​
Other | ​ |  | — | ​ |  | 1,619 | ​ |  | 2,031 | ​ |  | — | ​ |  | 3,650 | ​
Total | ​ | $ | — | ​ | $ | 1,619 | ​ | $ | 113,842 | ​ | $ | 5,100 | ​ | $ | 120,561 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Less than |  | 1 Through |  | 5 Through |  | After |  | ​ | ​ |
(dollars in thousands) | ​ | 1 Year | ​ | 5 years | ​ | 10 Years | ​ | 10 Years | ​ | Total |
December 31, 2020 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amortized Cost: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  | ​
Corporate bonds | ​ | $ | — | ​ | $ | — | ​ | $ | 57,000 | ​ | $ | — | ​ | $ | 57,000 | ​
Other | ​ |  | 500 | ​ |  | 1,012 | ​ |  | — | ​ |  | — | ​ |  | 1,512 | ​
Total | ​ | $ | 500 | ​ | $ | 1,012 | ​ | $ | 57,000 | ​ | $ | — | ​ | $ | 58,512 | ​
Weighted average yield | ​ |  | 1.83 | % |  | 2.81 | % |  | 5.39 | % |  | — | % |  | 5.32 | %
Estimated Fair Value: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​
Corporate bonds | ​ | $ | — | ​ | $ | — | ​ | $ | 58,358 | ​ | $ | — | ​ | $ | 58,358 | ​
Other | ​ |  | 503 | ​ |  | 1,107 | ​ |  | — | ​ |  | — | ​ |  | 1,610 | ​
Total | ​ | $ | 503 | ​ | $ | 1,107 | ​ | $ | 58,358 | ​ | $ | — | ​ | $ | 59,968 | ​

X
- Definition Tabular disclosure of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922900-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleAllowanceForCreditLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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 Tabular disclosure of investments in an unrealized loss position 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), including: (a) the aggregate related fair value of investments with unrealized losses, (b) 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_ScheduleOfTemporaryImpairmentLossesInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration