Financial Derivatives (Schedule of Derivative Activity) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Interest rate swaps
Derivative [Line Items]
Average Monthly Notional	$ 2,660,695	$ 1,343,094
TBA securities
Derivative [Line Items]
Average Monthly Notional	827,022	1,105,311
Credit default swaps
Derivative [Line Items]
Average Monthly Notional	60,999	110,084
Total return swaps
Derivative [Line Items]
Average Monthly Notional	0	2,593
Futures
Derivative [Line Items]
Average Monthly Notional	190,400	193,600
Options
Derivative [Line Items]
Average Monthly Notional	25,714	13,846
Forwards
Derivative [Line Items]
Average Monthly Notional	15,201	21,188
Warrants
Derivative [Line Items]
Average Monthly Notional	$ 3,289	$ 1,948