TWO Quarterly report pursuant to Section 13 or 15(d)

Serviced Mortgage Assets (Details) $ in Thousands	Mar. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($) loan
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Number of Loans \| loan	774,500	783,579
Unpaid Principal Balance \| $	$ 179,849,906	$ 178,928,983
Mortgage servicing rights
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Number of Loans \| loan	773,167	781,905
Unpaid Principal Balance \| $	$ 179,014,244	$ 177,861,483
Residential mortgage loans
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Number of Loans \| loan	1,332	1,674
Unpaid Principal Balance \| $	$ 835,633	$ 1,067,500
Other assets
Assets that Continue to be Recognized, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]
Number of Loans \| loan	1	0
Unpaid Principal Balance \| $	$ 29	$ 0