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Purchased Loans - Performing Status (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | $ 9,689,638 | $ 9,083,129
Commercial, financial, agricultural |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 1,367,972 | 1,295,912
Real estate – construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 826,483 | 740,668
Real estate – 1-4 family mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 2,866,613 | 2,795,343
Real estate – commercial mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 4,244,265 | 4,051,509
Installment loans to individuals |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 384,305 | 199,697
Purchased |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 2,101,664 | 2,693,417
Purchased | Performing and Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 543,747 | 619,073
Purchased | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 539,747 | 614,814
Purchased | Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 4,000 | 4,259
Purchased | Commercial, financial, agricultural | Performing and Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 13,935 | 21,372
Purchased | Commercial, financial, agricultural | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 13,935 | 21,303
Purchased | Commercial, financial, agricultural | Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 69
Purchased | Lease financing | Performing and Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Purchased | Lease financing | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Purchased | Lease financing | Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Purchased | Real estate – construction | Performing and Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 1,725 | 3,185
Purchased | Real estate – construction | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 1,725 | 3,185
Purchased | Real estate – construction | Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 0 | 0
Purchased | Real estate – 1-4 family mortgage | Performing and Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 398,114 | 530,404
Purchased | Real estate – 1-4 family mortgage | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 394,476 | 526,699
Purchased | Real estate – 1-4 family mortgage | Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 3,638 | 3,705
Purchased | Real estate – commercial mortgage | Performing and Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 30,573 | 31,136
Purchased | Real estate – commercial mortgage | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 30,472 | 30,951
Purchased | Real estate – commercial mortgage | Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 101 | 185
Purchased | Installment loans to individuals | Performing and Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 99,400 | 32,976
Purchased | Installment loans to individuals | Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | 99,139 | 32,676
Purchased | Installment loans to individuals | Non-Performing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total | $ 261 | $ 300

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