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Other Comprehensive Income (Loss) (Tables) | 9 Months Ended
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Sep. 30, 2020
Equity [Abstract] |
Components of Other Comprehensive Income (Loss) Pre-Tax and After-Tax | The following table provides the components of other comprehensive income (loss) on a pre-tax and after-tax basis for the periods presented (in thousands):
| Three Months Ended September 30,
| 2020 |  | 2019
| Pre-tax |  | Tax |  | After-tax |  | Pre-tax |  | Tax |  | After-tax
Net changes related to available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains arising during the period | $ | 5,518 |  |  | $ | 1,359 |  |  | $ | 4,159 |  |  | $ | 6,815 |  |  | $ | 1,671 |  |  | $ | 5,144 |
Less: Reclassification adjustments for (gains) losses realized in net income (loss) | (53,827) |  |  | (13,247) |  |  | (40,580) |  |  | 22 |  |  | 6 |  |  | 16 |
Other comprehensive income (loss) | $ | (48,309) |  |  | $ | (11,888) |  |  | $ | (36,421) |  |  | $ | 6,837 |  |  | $ | 1,677 |  |  | $ | 5,160 |
| Nine Months Ended September 30,
| 2020 |  | 2019
| Pre-tax |  | Tax |  | After-tax |  | Pre-tax |  | Tax |  | After-tax
Net changes related to available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |
Unrealized holding gains arising during the period | $ | 28,953 |  |  | $ | 7,320 |  |  | $ | 21,633 |  |  | $ | 38,685 |  |  | $ | 9,520 |  |  | $ | 29,165 |
Less: Reclassification adjustments for (gains) losses realized in net income (loss) | (54,294) |  |  | (13,362) |  |  | (40,932) |  |  | (87) |  |  | (21) |  |  | (66) |
Other comprehensive income (loss) | $ | (25,341) |  |  | $ | (6,042) |  |  | $ | (19,299) |  |  | $ | 38,598 |  |  | $ | 9,499 |  |  | $ | 29,099 |
Reclassification adjustment to retained earnings (1) | 791 |  |  | 194 |  |  | 597 |  |  | — |  |  | — |  |  | — |
Change in accumulated other comprehensive income | $ | (24,550) |  |  | $ | (5,848) |  |  | $ | (18,702) |  |  | $ | 38,598 |  |  | $ | 9,499 |  |  | $ | 29,099 |
(1)This amount represents reclassifications to retained earnings associated with the allowance for expected credit losses within accumulated other comprehensive income relating to available-for-sale debt security investments. See “—Note 2 (Significant Accounting Policies—Recently Adopted Accounting Pronouncements)” for more information.
Reclassifications Adjustment for Gains (Losses) Out of Accumulated Other Comprehensive Income | The following table provides the reclassification adjustments for gains (losses) out of accumulated other comprehensive income for the periods presented (in thousands):
Details about Accumulated Other Comprehensive Income (Loss) Components |  | Amount Reclassified from Accumulated Other Comprehensive Income (Loss) |  | Affected Line Item in the Statement Where Net Income is Presented
| Three Months Ended September 30, |  | Nine Months Ended September 30, |
| 2020 |  | 2019 |  | 2020 |  | 2019 |
Unrealized gains (losses) on available-for-sale debt securities |  |  |  |  |  |  |  |  |  |
|  | $ | 53,827 |  |  | $ | (22) |  |  | $ | 54,294 |  |  | $ | 87 |  |  | Net realized gains (losses) on sale of securities
|  | (13,247) |  |  | 6 |  |  | (13,362) |  |  | (21) |  |  | Income taxes
Total reclassification for the period |  | $ | 40,580 |  |  | $ | (16) |  |  | $ | 40,932 |  |  | $ | 66 |  |  | Net of tax

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