Derivatives (Offsetting of Derivatives) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Derivative assets
Derivative assets - Fair value	$ 689,100	$ 484,184
Less: Master netting agreements	(108,782)	(58,679)
Less: Cash collateral received/paid	(81,534)	(42,274)
Net derivative assets	498,784	383,231
Less: Security Collateral Received	0	0
Net Amount	498,784	383,231
Contracts not subject to master netting arrangements, gross amounts recognized	811	587
Derivative, cash collateral received, including amount offset by fair value assets, and excess cash amount	(87,600)	(47,000)
Amount used to offset against derivative assets	(81,534)	(42,274)
Derivative liabilities
Gross amounts recognized	692,029	390,171
Less: Master netting agreements	(108,782)	(58,679)
Less: Cash collateral received/paid	(326,299)	(174,048)
Net derivative liabilities	256,948	157,444
Less: Security Collateral Pledged	(42,627)	(106,598)
Net Amount	214,321	50,846
Contracts not subject to master netting arrangements, gross amounts recognized	834	666
Derivative, cash collateral posted against derivative liabilities, including amount offset the derivative fair value liabilities, and excess cash amount	330,200	176,500
Amount used to offset against derivative liabilities	$ (326,299)	$ (174,048)