Two Harbors Investment Corp. Annual report pursuant to Section 13 and 15(d)

Serviced Mortgage Assets (Details) $ in Thousands	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($) 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	720,999	458,133
Unpaid Principal Balance \| $	$ 165,529,153	$ 104,002,292
Servicing Contracts [Member]
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	717,167	454,028
Unpaid Principal Balance \| $	$ 163,102,308	$ 101,344,054
Loans in Securitization Trusts, Residential Mortgages [Member]
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	3,612	3,845
Unpaid Principal Balance \| $	$ 2,392,471	$ 2,618,016
Other Assets [Member]
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	220	260
Unpaid Principal Balance \| $	$ 34,374	$ 40,222