Unfunded Loan Commitments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Credit Loss [Abstract]
Contractual obligation	$ 2,000,000
Allowance [Abstract]
Beginning balance	72,713	$ 110,044	$ 2,481
Provisions for unfunded loan commitments	365,359	232,822	311,659
Other provision items	31,162	31,502	954
Transfer - funded loans	(344,310)	(301,655)	(320,808)
Ending balance	124,924	72,713	110,044
Unfunded Commitments
Beginning balance	1,776,976	1,673,018	1,910,603
Provision/New commitments - net	6,180,805	5,512,841	5,070,175
Other provision items	0	0	0
Transfer - funded loans	(5,961,973)	(5,408,883)	(5,307,760)
Ending balance	1,995,808	1,776,976	1,673,018
Adjustments
Allowance [Abstract]
Beginning balance		0	115,758
Ending balance			0
Unfunded Commitments
Beginning balance		0
Ending balance			0
Remaining Adjusted Transition Amounts to be Phased-In
Allowance [Abstract]
Beginning balance	72,713	110,044	118,239
Ending balance		72,713	110,044
Unfunded Commitments
Beginning balance	$ 1,776,976	1,673,018	1,910,603
Ending balance		$ 1,776,976	$ 1,673,018