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Recent Accounting and Regulatory Pronouncements (Tables) | 3 Months Ended
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Mar. 31, 2020
Recent Accounting and Regulatory Pronouncements |
Summary of impact of ASU | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | January 1, 2020 | ​ | ​ | ​
​ | ​ | As Reported Under | ​ | Pre-ASC 326 | ​ | Impact of ASC 326 | ​
Dollars in thousands |  | ASC 326 |  | Adoption |  | Adoption |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Allowance for Credit Losses on Debt Securities | ​ | ​ | ​ | ​ | ​ | ​ | ​
Investment Securities - Available for Sale | ​ | 1,956,047 | ​ | 1,956,047 | ​ | — | A
Investment Securities - Held to Maturity | ​ | — | ​ | — | ​ | — | A
Loans | ​ | ​ | ​ | ​ | ​ | ​ | ​
Non - Acquired Loans | ​ | 9,252,831 | ​ | 9,252,831 | ​ | — | ​
Acquired Loans | ​ | 2,118,940 | ​ | 2,117,209 | ​ | 1,723 | B
Allowance for Credit Losses on Loans | ​ | (111,365) | ​ | (56,927) | ​ | (54,438) | C
Deferred Tax Asset | ​ | 43,955 | ​ | 31,316 | ​ | 12,639 | D
Accrued Interest Receivable - Loans | ​ | 30,009 | ​ | 28,332 | ​ | 1,677 | B
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Liabilities: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Reserve for Loan Losses - Unfunded Commitments | ​ | 6,756 | ​ | 335 | ​ | 6,421 | E
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity: | ​ | ​ | ​ | ​ | ​ | ​ | ​
Retained Earnings | ​ | 635,075 | ​ | 679,895 | ​ | (44,820) | F
​ A - The Company did not have any held-to maturity securities as of January 1, 2020. Per our analysis we determined that no ACL was necessary for investment securities – available for sale. B – Accrued interest receivable from acquired credit impaired loans of $1,677 was reclassed to other assets and was offset by the reclass of the grossed up credit discount on acquired credit impaired loans of $3,408 that was moved to the ACL for the purchased credit deteriorated loans. C – This is the calculated adjustment to the ACL related to the adoption of ASC 326. Additional reserve related to non-acquired loans was $34,049, to acquired loans was $16,981 and to purchased credit deteriorated loans was $3,408. D – This is the effect of deferred tax assets related to the adjustment to the ACL from the adoption of ASC 326 using a 22% tax rate. E – This is the adjustment to the reserve for unfunded commitments related to the adoption of ASC 326. F – This is the net adjustment to retained earnings related to the adoption of ASC 326.

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- Definition Tabular disclosure of changes in accounting principles, including adoption of new accounting pronouncements, that describes the new methods, amount and effects on financial statement line items. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22499-107794 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=116846552&loc=d3e765-108305 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(b)(6)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=116846552&loc=d3e725-108305 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22583-107794 + Details
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