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Loans and Allowance for Credit Losses - Allowance for Credit Losses (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Jan. 01, 2020 | Mar. 31, 2020 | Mar. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning Balance | $ 94,777 | $ 94,777 | $ 83,575
Impact of adopting ASC 326 |  | 34,300 |
Charged-off loans |  | (11,693) | (6,068)
Recovery of previously charged-off loans |  | 1,538 | 2,503
Provision for Loan and Lease Losses |  | 99,741 | 7,184
Ending Balance |  | 222,465 | 87,194
Accounting Standards Update 2016-13 |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Impact of adopting ASC 326 | 38,102 |  |
Commercial real estate- owner occupied |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning Balance | 13,406 | 13,406 | 11,297
Charged-off loans |  | (1,561) | (521)
Recovery of previously charged-off loans |  | 145 | 60
Provision for Loan and Lease Losses |  | 11,380 | 1,782
Ending Balance |  | 23,634 | 12,618
Commercial real estate- owner occupied | Accounting Standards Update 2016-13 |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Impact of adopting ASC 326 | 264 |  |
Commercial real estate- Non-owner occupied |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning Balance | 19,963 | 19,963 | 15,649
Charged-off loans |  | (261) | (13)
Recovery of previously charged-off loans |  | 93 | 12
Provision for Loan and Lease Losses |  | 17,059 | 1,901
Ending Balance |  | 32,114 | 17,549
Commercial real estate- Non-owner occupied | Accounting Standards Update 2016-13 |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Impact of adopting ASC 326 | (4,740) |  |
Consumer real estate – mortgage |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning Balance | 8,054 | 8,054 | 7,670
Charged-off loans |  | (930) | (350)
Recovery of previously charged-off loans |  | 190 | 369
Provision for Loan and Lease Losses |  | 4,655 | 680
Ending Balance |  | 32,998 | 8,369
Consumer real estate – mortgage | Accounting Standards Update 2016-13 |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Impact of adopting ASC 326 | 21,029 |  |
Construction and land development |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning Balance | 12,662 | 12,662 | 11,128
Charged-off loans |  | 0 | 0
Recovery of previously charged-off loans |  | 43 | 122
Provision for Loan and Lease Losses |  | 29,350 | (335)
Ending Balance |  | 38,911 | 10,915
Construction and land development | Accounting Standards Update 2016-13 |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Impact of adopting ASC 326 | (3,144) |  |
Commercial and industrial |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning Balance | 36,112 | 36,112 | 31,731
Charged-off loans |  | (7,734) | (3,352)
Recovery of previously charged-off loans |  | 748 | 1,598
Provision for Loan and Lease Losses |  | 35,894 | 2,722
Ending Balance |  | 88,060 | 32,699
Commercial and industrial | Accounting Standards Update 2016-13 |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Impact of adopting ASC 326 | 23,040 |  |
Consumer and other |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning Balance | 3,595 | 3,595 | 5,423
Charged-off loans |  | (1,207) | (1,832)
Recovery of previously charged-off loans |  | 319 | 342
Provision for Loan and Lease Losses |  | 1,403 | 870
Ending Balance |  | 6,748 | 4,803
Consumer and other | Accounting Standards Update 2016-13 |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Impact of adopting ASC 326 | 2,638 |  |
Unallocated |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning Balance | 985 | 985 | 677
Charged-off loans |  | 0 | 0
Recovery of previously charged-off loans |  | 0 | 0
Provision for Loan and Lease Losses |  | 0 | (436)
Ending Balance |  | $ 0 | $ 241
Unallocated | Accounting Standards Update 2016-13 |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Impact of adopting ASC 326 | $ (985) |  |

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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 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 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
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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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