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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Statement of Financial Position [Abstract] |  |
Amortized cost | $ 1,718,357 | $ 1,757,666
Fair Value, Held-to-maturity | $ 678,948 | $ 721,537
Common stock, par value | $ 0 | $ 0
Common stock, authorized | 225,000,000 | 225,000,000
Common stock, shares issued | 140,102,480 | 140,000,017
Common stock, shares outstanding | 140,102,480 | 140,000,017

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