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FAIR VALUE MEASUREMENT - FV of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets:
Other assets - GNMA EBO loans	$ 7,405,052	$ 7,382,404
Carrying Value
Assets:
Cash and cash equivalents	320,327	215,664
Investment securities HTM	2,354	2,371
LHFI	7,403,767	7,381,124
Federal Home Loan Bank stock	73,722	55,293
Liabilities:
Certificates of deposit	3,056,518	3,227,954
Borrowings	2,094,000	1,745,000
Long-term debt	224,857	224,766
Fair Value
Assets:
Cash and cash equivalents	320,327	215,664
Investment securities HTM	2,305	2,331
LHFI	6,970,457	7,002,028
Federal Home Loan Bank stock	73,722	55,293
Liabilities:
Certificates of deposit	3,046,367	3,216,665
Borrowings	2,089,853	1,750,023
Long-term debt	175,314	132,996
Multifamily | Carrying Value
Assets:
LHFS – multifamily and other	2,079	6,788
Mortgage servicing rights – multifamily and SBA	28,863	29,987
Multifamily | Fair Value
Assets:
LHFS – multifamily and other	2,079	6,871
Mortgage servicing rights – multifamily and SBA	34,303	35,292
Other assets - GNMA EBO loans | Carrying Value
Assets:
Other assets - GNMA EBO loans	5,940	5,617
Other assets - GNMA EBO loans | Fair Value
Assets:
Other assets - GNMA EBO loans	5,940	5,617
Level 1 | Fair Value
Assets:
Cash and cash equivalents	320,327	215,664
Investment securities HTM	0	0
LHFI	0	0
Federal Home Loan Bank stock	0	0
Liabilities:
Certificates of deposit	0	0
Borrowings		0
Long-term debt	0	0
Level 1 | Multifamily | Fair Value
Assets:
LHFS – multifamily and other	0	0
Mortgage servicing rights – multifamily and SBA	0	0
Level 1 | Other assets - GNMA EBO loans | Fair Value
Assets:
Other assets - GNMA EBO loans	0	0
Level 2 | Fair Value
Assets:
Cash and cash equivalents	0	0
Investment securities HTM	2,305	2,331
LHFI	0	0
Federal Home Loan Bank stock	73,722	55,293
Liabilities:
Certificates of deposit	3,046,367	3,216,665
Borrowings	2,089,853	1,750,023
Long-term debt	175,314	132,996
Level 2 | Multifamily | Fair Value
Assets:
LHFS – multifamily and other	2,079	6,871
Mortgage servicing rights – multifamily and SBA	0	0
Level 2 | Other assets - GNMA EBO loans | Fair Value
Assets:
Other assets - GNMA EBO loans	0	0
Level 3 | Fair Value
Assets:
Cash and cash equivalents	0	0
Investment securities HTM	0	0
LHFI	6,970,457	7,002,028
Federal Home Loan Bank stock	0	0
Liabilities:
Certificates of deposit	0	0
Borrowings		0
Long-term debt	0	0
Level 3 | Multifamily | Fair Value
Assets:
LHFS – multifamily and other	0	0
Mortgage servicing rights – multifamily and SBA	34,303	35,292
Level 3 | Other assets - GNMA EBO loans | Fair Value
Assets:
Other assets - GNMA EBO loans	$ 5,940	$ 5,617

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amortized cost excluding accrued interest, after allowance for credit loss, of financing receivable. Excludes net investment in lease.

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