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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred tax assets: |  |
Basis differences related to financial derivatives | $ 100,099 | $ 51,177
Unrealized losses on securities | 0 | 2,805
Allowance for losses | 3,690 | 2,650
Unrealized losses on cash flow hedges | 6,065 | 1,491
Stock-based compensation | 1,027 | 571
Capital loss carryforwards and other-than-temporary impairment | 86 | 86
Valuation allowance | (86) | (86)
Other | 341 | 88
Total deferred tax assets | 112,242 | 59,601
Deferred tax liability: |  |
Basis differences related to hedged items | 91,460 | 42,940
Unrealized gains on securities | 2,364 | 0
Other | 97 | 151
Total deferred tax liability | 93,921 | 43,091
Net deferred tax asset | 18,321 | 16,510
Capital Loss Carryforward |  |
Deferred tax assets: |  |
Compensation and benefits | $ 1,020 | $ 819

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