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Securities Held-to-Maturity (Tables) | 6 Months Ended
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Jun. 30, 2020
Securities Held-to-Maturity |
Summary 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
June 30, 2020 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
B Piece bonds | ​ | $ | 84,830 | ​ | $ | 63,171 | ​ | $ | 1,296 | ​ | $ | 64,467 | ​ | $ | 1,069
APL certificates | ​ | ​ | 63,627 | ​ | ​ | 35,848 | ​ | ​ | 2,079 | ​ | ​ | 37,927 | ​ | ​ | 2,079
SFR bonds | ​ | ​ | 20,000 | ​ | ​ | 20,000 | ​ | ​ | (2,513) | ​ | ​ | 17,487 | ​ | ​ | —
Total | ​ | $ | 168,457 | ​ | $ | 119,019 | ​ | $ | 862 | ​ | $ | 119,881 | ​ | $ | 3,148
December 31, 2019 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
B Piece bonds | ​ | $ | 91,028 | ​ | $ | 68,699 | ​ | $ | 2,965 | ​ | $ | 71,664 | ​ | $ | —
SFR bonds | ​ | ​ | 20,000 | ​ | ​ | 20,000 | ​ | ​ | 74 | ​ | ​ | 20,074 | ​ | ​ | —
Total | ​ | $ | 111,028 | ​ | $ | 88,699 | ​ | $ | 3,039 | ​ | $ | 91,738 | ​ | $ | —
Summary of the 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): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Three Months Ended June 30, 2020
​ | ​ | APL | ​ | B Piece | ​ |  | ​
​ |  | Certificates |  | Bonds |  | Total
Beginning balance | ​ | $ | — | ​ | $ | 992 | ​ | $ | 992
Provision for credit loss expense | ​ |  | 2,079 | ​ |  | 77 | ​ |  | 2,156
Ending balance | ​ | $ | 2,079 | ​ | $ | 1,069 | ​ | $ | 3,148
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Six Months Ended June 30, 2020
​ | ​ | APL Certificates | ​ | B Piece Bonds | ​ | Total
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Beginning balance, prior to adoption of CECL | ​ | $ | — | ​ | $ | — | ​ | $ | —
Impact of adopting CECL - January 1, 2020 | ​ |  | — | ​ |  | 501 | ​ |  | 501
Provision for credit loss expense | ​ |  | 2,079 | ​ |  | 568 | ​ |  | 2,647
Ending balance | ​ | $ | 2,079 | ​ | $ | 1,069 | ​ | $ | 3,148
​

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- Definition Tabular disclosure of allowance for credit loss on 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 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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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 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
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