Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Held-to-maturity, allowance for credit losses	$ 1,388	$ 1,279
Available-for-sale, allowance for credit losses	0	0
Available-for-sale, amortized cost	$ 4,331,413	$ 7,130,861
Common stock, Class A, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, Class A, shares authorized (in shares)	350,000,000	175,000,000
Common stock, Class A, shares issued (in shares)	127,046,654	112,715,444
Common stock, Class A, shares outstanding (in shares)	127,046,654	112,715,444