Derivative Instruments (Balance Sheet Offsetting) (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		$ 99,862	$ 116,876
Derivative Asset, Amount Offset by Liabiilty		0	0
Derivative Assets	[1]	99,862	116,876
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		26,896	37,899
Derivative Liability, Amount Offset by Asset		0	0
Derivative Liabilities	[1]	26,896	37,899
Derivatives subject to master netting agreements
Derivative Asset, Fair Value, Gross Asset		99,544	116,702
Derivative Asset, Amount Offset by Liabiilty		0	0
Derivative Asset, Net Amount Presented in the Balance Sheet		99,544	116,702
Derivative Asset, Not Offset, Policy Election Deduction		(10,865)	(3,930)
Derivative Asset, Fair Value of Collateral		(76,526)	(107,492)
Derivative Asset, Fair Value, Amount Offset Against Collateral		12,153	5,280
Derivative Liability, Fair Value, Gross Liability		26,435	37,300
Derivative Liability, Amount Offset by Asset		0	0
Derivative Liability, Net Amount Presented in the Balance Sheet		26,435	37,300
Derivative Liability, Not Offset, Policy Election Deduction		(10,865)	(3,930)
Derivative Liability, Fair Value of Collateral		0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral		15,570	33,370
Derivatives not subject to master netting agreements
Derivative Asset, Fair Value, Gross Asset		318	174
Derivative Asset, Amount Offset by Liabiilty		0	0
Derivative Asset, Not Subject to Master Netting Arrangement		318	174
Derivative Liability, Fair Value, Gross Liability		461	599
Derivative Liability, Amount Offset by Asset		0	0
Derivative Liability, Not Subject to Master Netting Arrangement		$ 461	$ 599

[1] * The fair value of each class of derivative is shown in Note 11.