Derivatives (Offsetting Derivative Assets and Liabilities Subject to Master Netting Arrangements) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Gross Amounts Recognized, Derivative Assets	$ 133,175	$ 36,790
Gross Amounts Offset in the Statement of Financial Condition, Derivative Assets	(87,894)	(29,882)
Net Amounts Presented in the Statement of Financial Condition, Derivative Assets	45,281	6,908
Gross Amounts Not Offset in the Statement of Financial Condition - Financial Instruments, Derivative Assets	3,796	6,908
Gross Amounts Not offset in the Statement of Financial Condition - Cash Collateral, Derivative Assets	48,163	0
Net Amounts Presented in the Statement of Financial Condition, Derivative Assets	89,648	0
Gross Amounts Recognized, Derivative Liabilities	49,810	85,448
Gross Amounts Offset in the Statement of Financial Condition, Derivative Liabilities	(46,014)	(63,204)
Net Amounts Presented in the Statement of Financial Condition, Derivative Liabilities	3,796	22,244
Gross Amounts Not Offset in the Statement of Financial Condition - Financial Instruments, Derivative Liabilities	3,796	6,908
Gross Amounts Not offset in the Statement of Financial Condition - Cash Collateral, Derivative Liabilities	0	66,207
Gross Amounts Not Offset in the Statement of Financial Condition - Net Amount, Derivatives Liabilities	$ (0)	$ (50,871)