Derivatives (Offsetting Derivative Assets and Liabilities Subject to Master Netting Arrangements) (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gross Amounts Recognized, Derivative Assets	$ 237,433	$ 223,072
Gross Amounts Offset in the Statement of Financial Condition, Derivative Assets	(109,904)	(112,338)
Net Amounts Presented in the Statement of Financial Condition, Derivative Assets	127,529	110,734
Gross Amounts Not Offset in the Statement of Financial Condition - Financial Instruments, Derivative Assets	122,171	32,601
Gross Amounts Not offset in the Statement of Financial Condition - Cash Collateral, Derivative Assets	129,773	27,852
Net Amounts Presented in the Statement of Financial Condition, Derivative Assets	135,131	105,985
Gross Amounts Recognized, Derivative Liabilities	122,171	116,395
Gross Amounts Offset in the Statement of Financial Condition, Derivative Liabilities	0	(83,794)
Net Amounts Presented in the Statement of Financial Condition, Derivative Liabilities	122,171	32,601
Gross Amounts Not Offset in the Statement of Financial Condition - Financial Instruments, Derivative Liabilities	122,171	32,601
Gross Amounts Not offset in the Statement of Financial Condition - Cash Collateral, Derivative Liabilities	0	0
Gross Amounts Not Offset in the Statement of Financial Condition - Net Amount, Derivatives Liabilities	$ 0	$ 0