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Loans - Summary of Allowance for Loan Losses by Portfolio Class and Category (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Jan. 01, 2020 | Mar. 31, 2020 | Mar. 31, 2019
Allowance for Loan Losses [Roll Forward] |  |  |
Balance | $ 43,288 |  |
Portfolio loans, net |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2019 | 43,288 | $ 43,288 |
Provision for credit losses | (1,680) | 21,695 | $ 1,500
Charge-offs |  | (304) |
Recoveries |  | 801 |
Balance | 69,995 | 92,187 |
Portfolio loans, net | Commercial and industrial |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2019 | 27,455 | 27,455 |
Provision for credit losses | 0 | 11,591 |
Charge-offs |  | (63) |
Recoveries |  | 504 |
Balance | 33,949 | 45,981 |
Portfolio loans, net | CRE - investor owned |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2019 | 5,935 | 5,935 |
Provision for credit losses | (5) | 3,224 |
Charge-offs |  | (2) |
Recoveries |  | 14 |
Balance | 16,656 | 19,892 |
Portfolio loans, net | CRE - owner occupied |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2019 | 4,873 | 4,873 |
Provision for credit losses | (57) | 1,994 |
Charge-offs |  | 0 |
Recoveries |  | 69 |
Balance | 7,414 | 9,477 |
Portfolio loans, net | Construction and land development |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2019 | 2,611 | 2,611 |
Provision for credit losses | (217) | 2,309 |
Charge-offs |  | (31) |
Recoveries |  | 40 |
Balance | 7,577 | 9,895 |
Portfolio loans, net | Residential real estate |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2019 | 1,280 | 1,280 |
Provision for credit losses | (1,401) | 2,011 |
Charge-offs |  | (122) |
Recoveries |  | 157 |
Balance | 3,349 | 5,395 |
Portfolio loans, net | Consumer and other |  |  |
Allowance for Loan Losses [Roll Forward] |  |  |
Balance at December 31, 2019 | 1,134 | 1,134 |
Provision for credit losses | 0 | 566 |
Charge-offs |  | (86) |
Recoveries |  | 17 |
Balance | $ 1,050 | $ 1,547 |

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- Definition Amount of recovery of financing receivables doubtful of collection that were previously charged off. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 + Details
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- Definition Amount of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=118955255&loc=SL82922352-210448 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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