CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Investments under fair value option	$ 7,093	$ 10,283
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000.0	50,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Allowance for loan losses	$ 52,521	$ 272,624
Class A
Common stock, shares authorized (in shares)	950,000,000	950,000,000
Common stock, shares issued (in shares)	128,583,198	128,538,703
Common stock, shares outstanding (in shares)	128,583,198	128,538,703