Derivative Instruments (Offsetting Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Offsetting of Financial Assets, Derivatives
Derivatives, Gross Amounts of Recognized Financial Instruments	$ 15,332,538	$ 9,045,718
Derivatives, Gross Amounts Offset in the Consolidated Statement of Financial Position	(15,308,195)	(9,028,019)
Derivatives, Net Amounts Presented in the Consolidated Statements of Financial Position	24,343	17,699
Derivatives, Financial Instruments/Collateral	0	0
Derivatives, Net Amount	24,343	17,699
Offsetting of Financial Assets, Securities Purchased Under Agreements to Resell
Securities Purchased Under Agreements to Resell, Gross Amounts of Recognized Financial Instruments	0	25,000
Securities Purchased Under Agreements to Resell, Gross Amounts Offset in the Consolidated Statement of Financial Position	0	0
Securities Purchased Under Agreements to Resell, Net Amounts Presented in the Consolidated Statements of Financial Position	0	25,000
Securities Purchased Under Agreements to Resell, Financial Instruments/Collateral	0	0
Security Purchased under Agreement to Resell, Net Amount	0	25,000
Offsetting of Financial Assets, Total Assets
Total Assets, Gross Amounts of Recognized Financial Instruments	15,332,538	9,070,718
Total Assets, Gross Amounts Offset in the Consolidated Statement of Financial Position	(15,308,195)	(9,028,019)
Total Assets, Net Amounts Presented in the Consolidated Statements of Financial Position	24,343	42,699
Total Assets, Financial Instruments/Collateral	0	0
Total Assets, Net Amount	24,343	42,699
Offsetting of Financial Liabilities, Derivatives
Derivatives, Gross Amounts of Recognized Financial Instruments	27,242,182	21,248,026
Derivatives, Gross Amounts Offset in the Consolidated Statement of Financial Position	(23,619,586)	(18,596,679)
Derivatives, Net Amounts Presented in the Consolidated Statements of Financial Position	3,622,596	2,651,347
Derivatives, Financial Instruments/Collateral	(3,622,596)	(2,651,347)
Derivatives, Net Amount	0	0
Offsetting of Financial Liabilities, Total Liabilities
Total Liabilities, Gross Amounts of Recognized Financial Instruments	27,242,182	21,248,026
Total Liabilities, Gross Amounts Offset in the Consolidated Statement of Financial Position	(23,619,586)	(18,596,679)
Total Liabilities, Net Amounts Presented in the Consolidated Statements of Financial Position	3,622,596	2,651,347
Total Liabilities, Financial Instruments/Collateral	(3,622,596)	(2,651,347)
Total Liabilities, Net Amount	$ 0	$ 0