Derivative Instruments (Balance Sheet Offsetting) (Details) - USD ($) $ in Thousands		Mar. 31, 2022	Dec. 31, 2021
Derivative Asset, Fair Value, Gross Asset Including Not Subject to Master Netting Arrangement		$ 13,130	$ 41,842
Derivative Asset, Amount Offset by Liabiilty		0	0
Derivative Assets	[1]	13,130	41,842
Derivative Liability, Fair Value, Gross Liability Including Not Subject to Master Netting Arrangement		18,382	12,101
Derivative Liability, Amount Offset by Asset		0	0
Derivative Liabilities	[1]	18,382	12,101
Derivatives subject to master netting agreements
Derivative Asset, Fair Value, Gross Asset		12,805	40,970
Derivative Asset, Amount Offset by Liabiilty		0	0
Derivative Asset, Net Amount Presented in the Balance Sheet		12,805	40,970
Derivative Asset, Not Offset, Policy Election Deduction		(2,036)	(347)
Derivatve asset, fair value of collateral		(1,298)	0
Derivative Asset, Fair Value, Amount Offset Against Collateral		9,471	40,623
Derivative Liability, Fair Value, Gross Liability		18,308	12,019
Derivative Liability, Amount Offset by Asset		0	0
Derivative Liability, Net Amount Presented in the Balance Sheet		18,308	12,019
Derivative Liability, Not Offset, Policy Election Deduction		(2,036)	(347)
Derivative Liability, Fair Value of Collateral		(1,035)	(10,146)
Derivative Liability, Fair Value, Amount Offset Against Collateral		15,237	1,526
Derivatives not subject to master netting agreements
Derivative Asset, Fair Value, Gross Asset		325	872
Derivative Asset, Amount Offset by Liabiilty		0	0
Derivative Asset, Not Subject to Master Netting Arrangement		325	872
Derivative Liability, Fair Value, Gross Liability		74	82
Derivative Liability, Amount Offset by Asset		0	0
Derivative Liability, Not Subject to Master Netting Arrangement		$ 74	$ 82

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