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Basis of Presentation Basis of Presentation (Tables) | 3 Months Ended
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Mar. 31, 2020
Accounting Policies [Abstract] |
Schedule of Impact of ASU 2016-13 | The following table details the impact of ASU 2016-13 and the reclassification of loans for the identification of new portfolio loan segments under CECL:
| January 1, 2020
(dollars in thousands) | As Reported Under ASU 2016-13 |  | Pre-ASU 2016-13 |  | Impact of ASU 2016-13 Adoption
Assets: |  |  |  |  |  |  |  |
Loans held for investment (outstanding balance) |  |  |  |  |  |  |  |
Commercial real estate |  | $ | 2,946,319 |  |  |  | $ | 3,416,518 |  |  |  | $ | (470,199 | )
Commercial and industrial |  | 1,458,541 |  |  |  | 1,720,833 |  |  |  | (262,292 | )
Commercial construction |  | 345,263 |  |  |  | 375,445 |  |  |  | (30,182 | )
Business banking |  | 1,092,908 |  |  |  | — |  |  |  | 1,092,908 |
Consumer real estate |  | 1,235,352 |  |  |  | 1,545,323 |  |  |  | (309,971 | )
Other consumer |  | 58,769 |  |  |  | 79,033 |  |  |  | (20,264 | )
Allowance for credit losses on loans |  | (89,577 | ) |  |  | (62,224 | ) |  |  | (27,353 | )
Total loans held for investment, net |  | $ | 7,047,575 |  |  |  | $ | 7,074,928 |  |  |  | $ | (27,353 | )
Net deferred tax asset |  | $ | 19,317 |  |  |  | $ | 13,206 |  |  |  | $ | 6,111 |
Liabilities: |  |  |  |  |  |  |  |
Allowance for credit losses on unfunded loan commitments |  | $ | 4,462 |  |  |  | $ | 3,113 |  |  |  | $ | 1,349 |
Equity: |  |  |  |  |  |  |  |
Retained earnings |  | $ | 738,493 |  |  |  | $ | 761,083 |  |  |  | $ | (22,590 | )

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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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