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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Amortized Cost	$ 2,642,667	$ 1,129,057
Allowance for credit losses	$ (620)	$ (167)
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, authorized (in shares)	100,000,000	100,000,000
Common stock, issued (in shares)	100,000,000	100,000,000
Common stock, outstanding (in shares)	31,950,092	31,779,663

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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