Contingencies - Narrative (Details)		1 Months Ended		12 Months Ended				36 Months Ended
	Feb. 01, 2018 state	Apr. 30, 2019 USD ($)	Apr. 30, 2017 USD ($) state	Dec. 31, 2019 USD ($) loan	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) state	Dec. 31, 2015 state
Loss Contingencies [Line Items]
Accrued legal fees and settlements				$ 30,663,000	$ 62,763,000
Loss contingency accrual				$ 30,663,000	62,763,000	$ 51,057,000	$ 93,797,000
Number of states charging with regulatory action | state			29
Number of jurisdictions where regulatory actions were resolved | state	29
Number of loan files to be tested relating to escrow on residential real property | loan				9,000
Aggregate cash payments in connection with legal and regulatory settlements				$ 30,356,000	12,983,000	174,941,000
Number of state attorneys general charging with regulatory action | state			2
Outstanding representation and warranty repurchase demands				$ 47,000,000	$ 51,300,000
Outstanding representation and warranty repurchase demands, number of loans | loan				285	316
Representation warranty and compensatory fees obligations				$ 50,838,000	$ 49,267,000	19,229,000	24,285,000
Indemnification claims recovered						$ 29,900,000
Securities Class Action
Loss Contingencies [Line Items]
Accrued legal fees and settlements				30,700,000
Sold Advances
Loss Contingencies [Line Items]
Representation warranty and compensatory fees obligations				18,000,000
Consumer Financial Protection Bureau
Loss Contingencies [Line Items]
Loss contingency accrual							$ 12,500,000
Multistate Mortgage Committee
Loss Contingencies [Line Items]
Number of states who are part of confidential supervisory memorandum of understanding | state							5	6
Florida Attorney General
Loss Contingencies [Line Items]
Injunctive and equitable relief, costs, and civil money penalties sought			$ 10,000
Massachusetts Regulatory Agency
Loss Contingencies [Line Items]
Aggregate cash payments in connection with legal and regulatory settlements				$ 1,000,000
Litigation settlement expense		$ 675,000