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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Amortized cost | $ 2,908,746 | $ 2,344,174
Fair Value, Held-to-maturity | $ 1,055,523 | $ 604,223
Common stock, par value | $ 0 | $ 0
Common stock, authorized | 225,000,000 | 225,000,000
Common stock, shares issued | 135,927,287 | 135,600,501
Common stock, shares outstanding | 135,927,287 | 135,600,501

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