Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Amortized cost	$ 3,972,437	$ 3,185,249
Fair Value, Held-to-maturity	$ 2,134,183	$ 1,921,693
Common stock, authorized	225,000,000	225,000,000
Common stock, shares issued	140,025,579	135,526,025
Common stock, shares outstanding	140,025,579	135,526,025