Contingencies And Other Disclosures (Details) - USD ($)	3 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Loss Contingencies [Line Items]
Estimated litigation liability		$ 32,900,000
Accrued losses on loan repurchase exposure		31,900,000	$ 32,300,000
Mortgage Securitization Litigation
Loss Contingencies [Line Items]
Investment in proprietary securitizations subject to lawsuits		83,400,000
Investment in proprietary securitizations subject to indemnifications		231,200,000
Minimum
Loss Contingencies [Line Items]
Estimated reasonably possible losses in excess of currently established liabilities		0
Maximum
Loss Contingencies [Line Items]
Estimated reasonably possible losses in excess of currently established liabilities		$ 20,000,000
Scenario, Forecast
Loss Contingencies [Line Items]
Settlement payment to reduce accrual	$ 12,600,000