Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Fair Value, LHFS less loans transferred in at LOCM	$ 352,466	$ 688,079
Fair Value, Loans receivable	$ 353,912	$ 0
Common stock, shares outstanding	216,621,803	220,226,335
Common stock, shares issued	216,621,803	220,226,335
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized	400,000,000	400,000,000
Cash and due from banks
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 89,006	$ 92,955
Interest bearing cash and temporary investments
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 357	$ 2,574