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Loans and Allowance for Credit Losses - Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | $ 285,372 | $ 90,253 | $ 94,777 | $ 83,575
Impact of adopting ASC 326 |  |  | 38,102 |
Charged-off loans | (15,029) | (6,780) | (35,724) | (21,328)
Recovery of previously charged-off loans | 1,973 | 1,914 | 7,128 | 8,761
Provision for Loan and Lease Losses | 16,329 | 8,260 | 184,362 | 22,639
Ending Balance | 288,645 | 93,647 | 288,645 | 93,647
Accounting Standards Update 2016-13 |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Impact of adopting ASC 326 |  |  | 34,300 |
Commercial real estate- owner occupied |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 38,803 | 12,174 | 13,406 | 11,297
Impact of adopting ASC 326 |  |  | 264 |
Charged-off loans | (186) | (40) | (1,247) | (1,626)
Recovery of previously charged-off loans | 47 | 135 | 272 | 211
Provision for Loan and Lease Losses | (2,238) | (112) | 23,731 | 2,275
Ending Balance | 36,426 | 12,157 | 36,426 | 12,157
Commercial real estate- Non-owner occupied |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 68,426 | 18,652 | 19,963 | 15,649
Impact of adopting ASC 326 |  |  | (4,740) |
Charged-off loans | (222) | (62) | (485) | (75)
Recovery of previously charged-off loans | 432 | 74 | 631 | 962
Provision for Loan and Lease Losses | 1,223 | 1,796 | 54,490 | 3,924
Ending Balance | 69,859 | 20,460 | 69,859 | 20,460
Consumer real estate – mortgage |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 29,358 | 8,489 | 8,054 | 7,670
Impact of adopting ASC 326 |  |  | 21,029 |
Charged-off loans | (907) | (194) | (3,033) | (1,124)
Recovery of previously charged-off loans | 297 | 901 | 971 | 1,642
Provision for Loan and Lease Losses | 3,201 | (1,426) | 4,928 | (418)
Ending Balance | 31,949 | 7,770 | 31,949 | 7,770
Construction and land development |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 41,897 | 11,206 | 12,662 | 11,128
Impact of adopting ASC 326 |  |  | (3,144) |
Charged-off loans | 0 | (14) | 0 | (18)
Recovery of previously charged-off loans | 7 | 97 | 100 | 238
Provision for Loan and Lease Losses | (682) | 585 | 31,604 | 526
Ending Balance | 41,222 | 11,874 | 41,222 | 11,874
Commercial and industrial |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 100,610 | 37,436 | 36,112 | 31,731
Impact of adopting ASC 326 |  |  | 23,040 |
Charged-off loans | (12,984) | (5,082) | (27,982) | (13,842)
Recovery of previously charged-off loans | 799 | 407 | 3,798 | 4,749
Provision for Loan and Lease Losses | 13,783 | 1,814 | 67,240 | 11,937
Ending Balance | 102,208 | 34,575 | 102,208 | 34,575
Consumer and other |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 6,278 | 2,114 | 3,595 | 5,423
Impact of adopting ASC 326 |  |  | 2,638 |
Charged-off loans | (730) | (1,388) | (2,977) | (4,643)
Recovery of previously charged-off loans | 391 | 300 | 1,356 | 959
Provision for Loan and Lease Losses | 1,042 | 3,278 | 2,369 | 2,565
Ending Balance | 6,981 | 4,304 | 6,981 | 4,304
Unallocated |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 0 | 182 | 985 | 677
Impact of adopting ASC 326 |  |  | (985) |
Charged-off loans | 0 | 0 | 0 | 0
Recovery of previously charged-off loans | 0 | 0 | 0 | 0
Provision for Loan and Lease Losses | 0 | 2,325 | 0 | 1,830
Ending Balance | $ 0 | $ 2,507 | $ 0 | $ 2,507

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