Unfunded Loan Commitments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Credit Loss [Abstract]
Contractual obligation	$ 1,400,000		$ 1,400,000
Allowance
Beginning balance	32,707	$ 19,367	72,713	$ 110,044
Provision/New commitments - net	99,692	48,203	147,146	88,400
Other provision items	21,654	21,757	28,880	17,763
Transfer - funded loans	(40,528)	(24,555)	(135,214)	(151,435)
Ending balance	113,525	64,772	113,525	64,772
Unfunded Commitments
Beginning balance	561,748	457,453	1,776,976	1,673,018
Provision/New commitments - net	1,466,865	1,235,604	2,435,695	2,078,765
Other provision items	0	0	0	0
Transfer - funded loans	(614,773)	(531,361)	(2,798,831)	(2,590,087)
Ending balance	$ 1,413,840	$ 1,161,696	$ 1,413,840	$ 1,161,696