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OTHER INCOME, ASSETS AND LIABILITIES - Schedule of Accretion and Other Amortization (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Accretion and other amortization:    
Accretion of servicer advance investment and receivable interest income $ 451,824 $ 257,877
Accretion of excess mortgage servicing rights income 75,237 106,848
Accretion of net discount on securities and loans 295,753 164,806
Amortization of deferred financing costs (9,525) (13,889)
Amortization of discount on notes and bonds payable (1,367) (1,120)
Accretion of loan discount and premium amortization, net $ 811,922 $ 514,522