DERIVATIVE INSTRUMENTS - Summary of Fair Value Information about Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Assets
Total derivative assets	$ 748,432	$ 170,370	[1]
Liabilities
Interest rate swaps	272,055	747,036
Total derivative liabilities	379,708	881,537	[1]
Futures contracts
Assets
Other derivative assets	341,430	9,028
Total derivative assets	341,430	9,028
Liabilities
Other derivative liabilities	3,020	129,134
Total derivative liabilities	3,020	129,134
Purchase commitments
Assets
Other derivative assets	3,615	1,779
Total derivative assets	3,615	1,779
Liabilities
Other derivative liabilities	532	870
Total derivative liabilities	532	870
Interest rate swaps
Assets
Total derivative assets	9,408
Liabilities
Total derivative liabilities	272,055	747,036
Current notional	35,222,000	45,907,300
Interest rate swaps	9,408	0
Interest rate swaptions
Assets
Other derivative assets	333,318	105,710
Total derivative assets	333,318	105,710
TBA derivatives
Assets
Other derivative assets	60,661	52,693
Total derivative assets	60,661	52,693
Liabilities
Other derivative liabilities	91,124	3,916
Total derivative liabilities	91,124	3,916
Credit derivatives
Assets
Other derivative assets	0	1,160
Total derivative assets		1,160
Liabilities
Other derivative liabilities	12,977	581
Total derivative liabilities	12,977	581
Credit derivatives | Maximum
Liabilities
Current notional	$ 410,000	$ 400,000

[1] (1)Derived from the audited consolidated financial statements at December 31, 2021.