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Loans and Allowance for Loan and Lease Losses - Summary of Allowance for Loan and Lease Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | $ 15,405 |  |  |  | $ 12,567 | $ 15,405 | $ 12,567 | $ 8,843
Provision for loan losses | $ 1,931 | $ 572 | $ 1,447 | 7,678 | $ 2,446 | $ 2,819 | $ 1,939 | (511) | 11,628 | 6,693 | 4,529
Charge-offs |  |  |  |  |  |  |  |  | (8,418) | (5,152) | (1,389)
Recoveries |  |  |  |  |  |  |  |  | 2,236 | 1,297 | 584
Reclassification To Held for Sale |  |  |  |  |  |  |  |  | (2,103) |  |
Ending Balance | 18,748 |  |  |  | 15,405 |  |  |  | 18,748 | 15,405 | 12,567
Commercial real estate |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 1,813 |  |  |  | 1,489 | 1,813 | 1,489 | 533
Provision for loan losses |  |  |  |  |  |  |  |  | 1,822 | 313 | 1,055
Charge-offs |  |  |  |  |  |  |  |  | (259) | (5) | (152)
Recoveries |  |  |  |  |  |  |  |  | 59 | 16 | 53
Ending Balance | 3,435 |  |  |  | 1,813 |  |  |  | 3,435 | 1,813 | 1,489
Construction, land development, land |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 465 |  |  |  | 367 | 465 | 367 | 333
Provision for loan losses |  |  |  |  |  |  |  |  | 825 | 92 | 34
Charge-offs |  |  |  |  |  |  |  |  | (582) |  |
Recoveries |  |  |  |  |  |  |  |  | 175 | 6 |
Ending Balance | 883 |  |  |  | 465 |  |  |  | 883 | 465 | 367
1-4 family residential properties |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 253 |  |  |  | 274 | 253 | 274 | 215
Provision for loan losses |  |  |  |  |  |  |  |  | 24 | (22) | 60
Charge-offs |  |  |  |  |  |  |  |  | (31) | (84) | (205)
Recoveries |  |  |  |  |  |  |  |  | 47 | 85 | 204
Ending Balance | 293 |  |  |  | 253 |  |  |  | 293 | 253 | 274
Farmland |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 170 |  |  |  | 134 | 170 | 134 | 19
Provision for loan losses |  |  |  |  |  |  |  |  | 140 | 36 | 115
Ending Balance | 310 |  |  |  | 170 |  |  |  | 310 | 170 | 134
Commercial Loans |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 8,014 |  |  |  | 5,276 | 8,014 | 5,276 | 4,003
Provision for loan losses |  |  |  |  |  |  |  |  | 5,785 | 5,390 | 1,375
Charge-offs |  |  |  |  |  |  |  |  | (4,875) | (3,643) | (145)
Recoveries |  |  |  |  |  |  |  |  | 1,329 | 991 | 43
Reclassification To Held for Sale |  |  |  |  |  |  |  |  | (2,103) |  |
Ending Balance | 8,150 |  |  |  | 8,014 |  |  |  | 8,150 | 8,014 | 5,276
Factored receivables |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 4,088 |  |  |  | 4,509 | 4,088 | 4,509 | 3,462
Provision for loan losses |  |  |  |  |  |  |  |  | 2,058 | 315 | 1,508
Charge-offs |  |  |  |  |  |  |  |  | (1,667) | (856) | (540)
Recoveries |  |  |  |  |  |  |  |  | 118 | 120 | 79
Ending Balance | 4,597 |  |  |  | 4,088 |  |  |  | 4,597 | 4,088 | 4,509
Consumer |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 420 |  |  |  | 216 | 420 | 216 | 140
Provision for loan losses |  |  |  |  |  |  |  |  | 859 | 689 | 218
Charge-offs |  |  |  |  |  |  |  |  | (1,004) | (564) | (347)
Recoveries |  |  |  |  |  |  |  |  | 508 | 79 | 205
Ending Balance | 783 |  |  |  | 420 |  |  |  | 783 | 420 | 216
Mortgage warehouse |  |  |  |  |  |  |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | $ 182 |  |  |  | $ 302 | 182 | 302 | 138
Provision for loan losses |  |  |  |  |  |  |  |  | 115 | (120) | 164
Ending Balance | $ 297 |  |  |  | $ 182 |  |  |  | $ 297 | $ 182 | $ 302

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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