Quarterly report pursuant to Section 13 or 15(d)

Serviced Mortgage Assets (Details)

v3.8.0.1
Serviced Mortgage Assets (Details)
$ in Thousands
Mar. 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 504,376 458,133
Unpaid Principal Balance | $ $ 114,304,141 $ 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 500,338 454,028
Unpaid Principal Balance | $ $ 111,703,234 $ 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 3,791 3,845
Unpaid Principal Balance | $ $ 2,562,653 $ 2,618,016
Loans Held-for-Sale, 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 225 236
Unpaid Principal Balance | $ $ 36,016 $ 37,632
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 22 24
Unpaid Principal Balance | $ $ 2,238 $ 2,590