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Loans and Allowance for Loan Losses - Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | $ 90,253 | $ 75,670 | $ 83,575 | $ 67,240
Charged-off loans | (6,780) | (6,949) | (21,328) | (22,316)
Recovery of previously charged-off loans | 1,914 | 2,539 | 8,761 | 10,003
Provision for loan losses | 8,260 | 8,725 | 22,639 | 25,058
Ending Balance | 93,647 | 79,985 | 93,647 | 79,985
Commercial real estate - mortgage |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 30,826 | 24,848 | 26,946 | 21,188
Charged-off loans | (102) | (1,968) | (1,701) | (2,930)
Recovery of previously charged-off loans | 209 | 63 | 1,173 | 1,517
Provision for loan losses | 1,684 | 3,574 | 6,199 | 6,742
Ending Balance | 32,617 | 26,517 | 32,617 | 26,517
Consumer real estate - mortgage |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 8,489 | 5,853 | 7,670 | 5,031
Charged-off loans | (194) | (262) | (1,124) | (1,533)
Recovery of previously charged-off loans | 901 | 987 | 1,642 | 2,190
Provision for loan losses | (1,426) | 149 | (418) | 1,039
Ending Balance | 7,770 | 6,727 | 7,770 | 6,727
Construction and land development |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 11,206 | 10,984 | 11,128 | 8,962
Charged-off loans | (14) | (24) | (18) | (36)
Recovery of previously charged-off loans | 97 | 70 | 238 | 1,645
Provision for loan losses | 585 | (48) | 526 | 411
Ending Balance | 11,874 | 10,982 | 11,874 | 10,982
Commercial and industrial |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 37,436 | 28,338 | 31,731 | 24,863
Charged-off loans | (5,082) | (3,336) | (13,842) | (7,600)
Recovery of previously charged-off loans | 407 | 1,037 | 4,749 | 2,492
Provision for loan losses | 1,814 | 4,085 | 11,937 | 10,369
Ending Balance | 34,575 | 30,124 | 34,575 | 30,124
Consumer and other |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 2,114 | 5,172 | 5,423 | 5,874
Charged-off loans | (1,388) | (1,359) | (4,643) | (10,217)
Recovery of previously charged-off loans | 300 | 382 | 959 | 2,159
Provision for loan losses | 3,278 | 618 | 2,565 | 6,997
Ending Balance | 4,304 | 4,813 | 4,304 | 4,813
Unallocated |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Beginning Balance | 182 | 475 | 677 | 1,322
Charged-off loans | 0 | 0 | 0 | 0
Recovery of previously charged-off loans | 0 | 0 | 0 | 0
Provision for loan losses | 2,325 | 347 | 1,830 | (500)
Ending Balance | $ 2,507 | $ 822 | $ 2,507 | $ 822

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