Derivative Instruments (Balance Sheet Offsetting) (Details) - USD ($) $ in Thousands		Mar. 31, 2023	Dec. 31, 2022
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		$ 100,157	$ 60,492
Derivative Asset, Amount Offset by Liabiilty		0	0
Derivative Assets	[1]	100,157	60,492
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		43,068	54,984
Derivative Liability, Amount Offset by Asset		0	0
Derivative Liabilities	[1]	43,068	54,984
Derivatives subject to master netting agreements
Derivative Asset, Fair Value, Gross Asset		100,005	60,270
Derivative Asset, Amount Offset by Liabiilty		0	0
Derivative Asset, Net Amount Presented in the Balance Sheet		100,005	60,270
Derivative Asset, Not Offset, Policy Election Deduction		(2,255)	(1,007)
Derivatve asset, fair value of collateral		(93,822)	(56,816)
Derivative Asset, Fair Value, Amount Offset Against Collateral		3,928	2,447
Derivative Liability, Fair Value, Gross Liability		42,694	54,609
Derivative Liability, Amount Offset by Asset		0	0
Derivative Liability, Net Amount Presented in the Balance Sheet		42,694	54,609
Derivative Liability, Not Offset, Policy Election Deduction		(2,255)	(1,007)
Derivative Liability, Fair Value of Collateral		0	0
Derivative Liability, Fair Value, Amount Offset Against Collateral		40,439	53,602
Derivatives not subject to master netting agreements
Derivative Asset, Fair Value, Gross Asset		152	222
Derivative Asset, Amount Offset by Liabiilty		0	0
Derivative Asset, Not Subject to Master Netting Arrangement		152	222
Derivative Liability, Fair Value, Gross Liability		374	375
Derivative Liability, Amount Offset by Asset		0	0
Derivative Liability, Not Subject to Master Netting Arrangement		$ 374	$ 375

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