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Securities Held-to-Maturity (Tables) | 12 Months Ended
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Dec. 31, 2022
Securities Held-to-Maturity |
Schedule of securities held-to-maturity | A summary of our securities held-to-maturity is as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Net Carrying | ​ | Unrealized | ​ | Estimated | ​ | Allowance for
​ |  | Face Value |  | Value |  | Gain (Loss) |  | Fair Value |  | Credit Losses
December 31, 2022 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
APL certificates | ​ | $ | 192,791 | ​ | $ | 123,475 | ​ | $ | (13,348) | ​ | $ | 110,127 | ​ | $ | 2,783
B Piece bonds | ​ | ​ | 41,464 | ​ | ​ | 33,072 | ​ | ​ | 1,372 | ​ | ​ | 34,444 | ​ | ​ | 370
Total | ​ | $ | 234,255 | ​ | $ | 156,547 | ​ | $ | (11,976) | ​ | $ | 144,571 | ​ | $ | 3,153
December 31, 2021 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
APL certificates | ​ | $ | 149,368 | ​ | $ | 92,869 | ​ | $ | 5,007 | ​ | $ | 97,876 | ​ | $ | 1,422
B Piece bonds | ​ | ​ | 61,360 | ​ | ​ | 47,615 | ​ | ​ | 4,420 | ​ | ​ | 52,035 | ​ | ​ | 331
Total | ​ | $ | 210,728 | ​ | $ | 140,484 | ​ | $ | 9,427 | ​ | $ | 149,911 | ​ | $ | 1,753
​
Schedule of changes in the allowance for credit losses | A summary of the changes in the allowance for credit losses for our securities held-to-maturity is as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, 2022
​ | ​ | APL | ​ | B Piece | ​ | ​
​ | ​ | Certificates | ​ | Bonds | ​ | Total
Beginning balance | ​ | $ | 1,422 | ​ | $ | 331 | ​ | $ | 1,753
Provision for credit loss expense/(reversal) | ​ |  | 1,361 | ​ |  | 39 | ​ |  | 1,400
Ending balance | ​ | $ | 2,783 | ​ | $ | 370 | ​ | $ | 3,153
​

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- 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 https://asc.fasb.org/extlink&oid=126970911&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 https://asc.fasb.org/extlink&oid=126970911&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 https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563 + Details
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