Unfunded Loan Commitments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Credit Loss [Abstract]
Contractual obligation	$ 562,000
Allowance
Beginning balance	72,713	$ 110,044
Provision/New commitments - net	47,454	40,197
Other provision items	7,226	(3,994)
Transfer - funded loans	(94,686)	(126,880)
Ending balance	32,707	19,367
Unfunded Commitments
Beginning balance	1,776,976	1,673,018
Provision/New commitments - net	968,830	843,161
Other provision items	0	0
Transfer - funded loans	(2,184,058)	(2,058,726)
Ending balance	$ 561,748	$ 457,453