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Equity method investment - Narrative (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Schedule of Equity Method Investments [Line Items] |  |  |
Technology, trade name and customer relationship intangibles | $ 31,997,000 |  | $ 33,819,000
Amortization of Intangible Assets | 1,871,000 | $ 2,206,000 |
Dividends received from equity method investment | 12,232,000 | 9,993,000 |
Loans | 24,499,022,000 |  | 23,414,262,000
Bankers Healthcare Group, LLC |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Technology, trade name and customer relationship intangibles | 6,700,000 |  | 6,800,000
Amortization of Intangible Assets | 128,000 | 188,000 |
Accretion income | 243,000 | 452,000 |
Dividends received from equity method investment | 12,200,000 | 10,000,000 |
Payments to Acquire Loans Held-for-investment | 0 | $ 74,600,000 |
Loans | $ 297,600,000 |  | $ 319,100,000

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