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Loans and Allowance for Loan and Lease Losses - Summary of Individual and Collective Allowance for Loan Losses and Loan Balances by Class (Details) - USD ($) $ in Thousands | Sep. 30, 2016 | Jun. 30, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | --- | --- | --- | --- | ---
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, Individually | $ 36,017 |  | $ 12,680 |  |  |
Loan Evaluation, Collectively | 1,893,495 |  | 1,265,974 |  |  |
Loan, Total | 1,959,855 |  | 1,291,885 |  |  |
ALLL Allocations, Individually | 4,497 |  | 2,591 |  |  |
ALLL Allocations, Collectively | 9,974 |  | 9,621 |  |  |
ALLL Allocations, Total ALLL | 14,912 | $ 13,772 | 12,567 | $ 11,544 | $ 11,462 | $ 8,843
Purchase Credit Impaired |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, PCI | 30,343 |  | 13,231 |  |  |
ALLL Allocations, PCI | 441 |  | 355 |  |  |
Commercial real estate |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, Individually | 676 |  | 724 |  |  |
Loan Evaluation, Collectively | 405,812 |  | 286,006 |  |  |
Loan, Total | 420,742 |  | 291,819 |  |  |
ALLL Allocations, Individually | 100 |  | 100 |  |  |
ALLL Allocations, Collectively | 1,371 |  | 1,034 |  |  |
ALLL Allocations, Total ALLL | 1,912 | 1,792 | 1,489 | 1,395 | 1,214 | 533
Commercial real estate | Purchase Credit Impaired |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, PCI | 14,254 |  | 5,089 |  |  |
ALLL Allocations, PCI | 441 |  | 355 |  |  |
Construction, land development, land |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, Individually | 276 |  |  |  |  |
Loan Evaluation, Collectively | 96,943 |  | 42,499 |  |  |
Loan, Total | 101,169 |  | 43,876 |  |  |
ALLL Allocations, Individually | 25 |  |  |  |  |
ALLL Allocations, Collectively | 207 |  | 367 |  |  |
ALLL Allocations, Total ALLL | 232 | 181 | 367 | 443 | 346 | 333
Construction, land development, land | Purchase Credit Impaired |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, PCI | 3,950 |  | 1,377 |  |  |
1-4 family residential properties |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, Individually | 1,139 |  | 618 |  |  |
Loan Evaluation, Collectively | 105,114 |  | 74,714 |  |  |
Loan, Total | 108,721 |  | 78,244 |  |  |
ALLL Allocations, Individually | 1 |  | 1 |  |  |
ALLL Allocations, Collectively | 254 |  | 273 |  |  |
ALLL Allocations, Total ALLL | 255 | 259 | 274 | 279 | 251 | 215
1-4 family residential properties | Purchase Credit Impaired |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, PCI | 2,468 |  | 2,912 |  |  |
Farmland |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, Collectively | 139,109 |  | 33,573 |  |  |
Loan, Total | 139,109 |  | 33,573 |  |  |
ALLL Allocations, Collectively | 121 |  | 134 |  |  |
ALLL Allocations, Total ALLL | 121 | 143 | 134 | 29 | 28 | 19
Commercial Loans |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, Individually | 30,059 |  | 7,916 |  |  |
Loan Evaluation, Collectively | 738,076 |  | 483,587 |  |  |
Loan, Total | 777,806 |  | 495,356 |  |  |
ALLL Allocations, Individually | 2,851 |  | 796 |  |  |
ALLL Allocations, Collectively | 4,969 |  | 4,480 |  |  |
ALLL Allocations, Total ALLL | 7,820 | 6,697 | 5,276 | 5,308 | 5,064 | 4,003
Commercial Loans | Purchase Credit Impaired |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, PCI | 9,671 |  | 3,853 |  |  |
Factored receivables |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, Individually | 3,812 |  | 3,422 |  |  |
Loan Evaluation, Collectively | 210,143 |  | 211,666 |  |  |
Loan, Total | 213,955 |  | 215,088 |  |  |
ALLL Allocations, Individually | 1,520 |  | 1,694 |  |  |
ALLL Allocations, Collectively | 2,425 |  | 2,815 |  |  |
ALLL Allocations, Total ALLL | 3,945 | 4,204 | 4,509 | 3,609 | 4,135 | 3,462
Consumer |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, Individually | 55 |  |  |  |  |
Loan Evaluation, Collectively | 25,547 |  | 13,050 |  |  |
Loan, Total | 25,602 |  | 13,050 |  |  |
ALLL Allocations, Collectively | 368 |  | 216 |  |  |
ALLL Allocations, Total ALLL | 368 | 293 | 216 | 225 | 160 | 140
Mortgage warehouse |  |  |  |  |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |  |  |  |  |
Loan Evaluation, Collectively | 172,751 |  | 120,879 |  |  |
Loan, Total | 172,751 |  | 120,879 |  |  |
ALLL Allocations, Collectively | 259 |  | 302 |  |  |
ALLL Allocations, Total ALLL | $ 259 | $ 203 | $ 302 | $ 256 | $ 264 | $ 138

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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + 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=66008989&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + 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=66008989&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=66008989&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=66008989&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=6379141&loc=d3e15032-111544 + Details
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