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Business Combination - Schedule of Business Acquisitions (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Apr. 01, 2019 | Jul. 01, 2018
Business Acquisition [Line Items] |  |  |  |  |
Payments to Acquire Businesses, Gross | $ 28,630 | $ 30,684 | $ 0 |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | 98,275 | 48,519 |  |  |
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value |  | 7,000 |  |  |
Business Combination, Consideration Transferred | 126,905 | 86,203 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents |  |  |  | $ 23,799 | $ 42,954
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Marketable Securities |  |  |  | 97,606 | 1,954
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables |  |  |  | 578,577 | 272,753
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment |  |  |  | 8,337 | 940
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles |  |  |  | 8,207 | 6,249
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets |  |  |  |  | 1,300
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets |  |  |  | 32,123 | 6,133
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets |  |  |  | 748,649 | 332,283
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities |  |  |  | 632,649 | 284,231
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities |  |  |  | 35,951 | 2,254
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities |  |  |  | 668,600 | 286,485
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net |  |  |  | 80,049 | 45,798
Goodwill, Acquired During Period | 46,856 | 40,405 |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  | 589,698 | 277,919
Business Combination, Acquired Receivable, Fair Value |  |  |  | 578,577 | 272,753
Commercial Financial Agricultural [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  | 80,895 | 19,246
Business Combination, Acquired Receivable, Fair Value |  |  |  | 80,580 | 19,138
Commercial Real Estate [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  | 281,425 | 119,434
Business Combination, Acquired Receivable, Fair Value |  |  |  | 273,855 | 117,638
Construction Real Estate Commercial [Domain] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  | 43,106 | 22,494
Business Combination, Acquired Receivable, Fair Value |  |  |  | 42,176 | 22,235
Construction Real Estate Mortgage [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  | 11,130 | 8,391
Business Combination, Acquired Receivable, Fair Value |  |  |  | 10,633 | 8,111
Residential Real Estate Commercial [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  | 48,546 | 14,798
Business Combination, Acquired Receivable, Fair Value |  |  |  | 48,684 | 14,797
Residential Real Estate Mortgage [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  | 30,519 | 50,295
Business Combination, Acquired Receivable, Fair Value |  |  |  | 30,969 | 48,714
Residential Real Estate Home Equity Line Of Credit [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  | 40,825 | 37,651
Business Combination, Acquired Receivable, Fair Value |  |  |  | 39,853 | 36,688
Consumer Loan [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  | 4,813 | 541
Business Combination, Acquired Receivable, Fair Value |  |  |  | 4,647 | 539
Purchased credit impaired [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  | 19,850 | 5,069
Business Combination, Acquired Receivable, Fair Value |  |  |  | 18,399 | $ 4,893
Leases |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Business Combination, Acquired Receivables, Gross Contractual Amount |  |  |  | 28,589 |
Business Combination, Acquired Receivable, Fair Value |  |  |  | $ 28,781 |
NewDominion [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Goodwill, Acquired During Period |  | $ 40,405 |  |  |
Carolina Alliance [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Goodwill, Acquired During Period | $ 46,856 |  |  |  |

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