Variable Interest Entities (VIEs) (Narrative) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Variable Interest Entities
Assets	$ 17,175,674	$ 17,266,588
Total liabilities	10,001,098	10,062,667
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entities
Assets	64,963	69,435
Variable Interest Entity, Primary Beneficiary
Variable Interest Entities
Assets	4,569,514	4,564,621
Total liabilities	$ 2,378,725	$ 2,517,652