DERIVATIVE INSTRUMENTS - Summary of Fair Value Information about Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Assets
Total derivative assets	$ 1,949,530	$ 170,370	[1]
Liabilities
Interest rate swaps	108,071	747,036
Total derivative liabilities	764,535	881,537	[1]
Futures contracts
Assets
Other derivative assets	1,539,298	9,028
Total derivative assets	1,539,298	9,028
Liabilities
Other derivative liabilities	2,946	129,134
Total derivative liabilities	2,946	129,134
Purchase commitments
Assets
Other derivative assets	1,037	1,779
Total derivative assets	1,037	1,779
Liabilities
Other derivative liabilities	2,485	870
Total derivative liabilities	2,485	870
Interest rate swaps
Assets
Total derivative assets	36,861
Liabilities
Total derivative liabilities	108,071	747,036
Current notional	40,867,500	45,907,300
Interest rate swaps	36,861	0
Interest rate swaptions
Assets
Other derivative assets	344,301	105,710
Total derivative assets	344,301	105,710
TBA derivatives
Assets
Other derivative assets	28,033	52,693
Total derivative assets	28,033	52,693
Liabilities
Other derivative liabilities	635,652	3,916
Total derivative liabilities	635,652	3,916
Credit derivatives
Assets
Other derivative assets	0	1,160
Total derivative assets		1,160
Liabilities
Other derivative liabilities	15,381	581
Total derivative liabilities	15,381	581
Credit derivatives | Maximum
Liabilities
Current notional	$ 420,000	$ 400,000

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