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Derivative Financial Instruments and Hedging - Schedule of Gross Notional and Fair Value Amounts of Derivatives (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Derivative [Line Items] |  |
Notional values | $ 753,205 | $ 549,966
Asset derivatives | 12,688 | 11,529
Liability derivatives | 1,095 | 2,090
Interest rate lock commitments |  |
Derivative [Line Items] |  |
Notional values | 304,757 | 219,929
Asset derivatives | 8,284 | 9,207
Liability derivatives | 0 | 0
Forward delivery contracts |  |
Derivative [Line Items] |  |
Notional values | 51,981 | 35,979
Asset derivatives | 109 | 0
Liability derivatives | 0 | 22
TBA mortgage backed securities |  |
Derivative [Line Items] |  |
Notional values | 395,000 | 291,000
Asset derivatives | 3,628 | 232
Liability derivatives | 403 | 1,508
Other |  |
Derivative [Line Items] |  |
Notional values | 1,467 | 3,058
Asset derivatives | 667 | 2,090
Liability derivatives | $ 692 | $ 560

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