Variable Interest Entities (VIEs) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Variable Interest Entities (VIEs)
Total Assets	$ 11,278,638	$ 9,645,375	$ 6,371,928
Total Liabilities	10,123,229	$ 8,834,754
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entities (VIEs)
Total Assets	36,573
Total Liabilities	21,014
Maximum Exposure to Loss	$ 36,164