Variable Interest Entities (VIEs) (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity
Assets	$ 17,266,588	$ 16,221,822
Liabilities	10,062,667	8,667,400
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity
Assets	69,435	224,754
Variable Interest Entity, Primary Beneficiary
Variable Interest Entity
Assets	4,564,621	4,053,841
Liabilities	$ 2,517,652	$ 1,722,719