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Income Taxes - Income Tax Reconciliation (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Provision (benefit) for income taxes: |  |  |  |  |
Federal—current |  |  | $ 54,867 | $ (10,424) | $ 7,262
Federal—deferred |  |  | 14,322 | 8,834 | (3,356)
State—current |  |  | 9,566 | 2,956 | 3,943
State—deferred |  |  | (526) | (625) | (1,126)
Foreign—current |  |  | 83,154 | 50,063 | 49,350
Foreign—deferred |  |  | 14,907 | (21,195) | 3,858
Provision (Benefit) for Income Taxes | $ 10,080 | $ 14,640 | 176,290 | 29,609 | 59,931
Changes in income taxes resulting from: |  |  |  |  |
Computed "expected” tax provision |  |  | 132,093 | 78,268 | 68,910
Tax adjustment relating to REIT |  |  | (8,203) | (60,378) | (40,577)
State taxes (net of federal tax benefit) |  |  | 8,027 | 2,258 | 2,115
Increase (decrease) in valuation allowance (net operating losses) |  |  | 8,406 | (8,337) | 6,211
Withholding Taxes |  |  | 23,654 | 6,835 | 5,281
Reserve (reversal) accrual and audit settlements (net of federal tax benefit) |  |  | 3,072 | (7,409) | 514
Foreign tax rate differential |  |  | 9,856 | 9,472 | 8,562
Disallowed foreign interest, Subpart F income, and other foreign taxes |  |  | (3,437) | 13,407 | 8,960
Other, net |  |  | 2,822 | (4,507) | (45)
Provision (Benefit) for Income Taxes | $ 10,080 | $ 14,640 | $ 176,290 | $ 29,609 | $ 59,931

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