Discontinued Operations (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended				12 Months Ended
	Sep. 30, 2016	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Discontinued Operations [Abstract]
Disposal Group, Including Discontinued Operation, Other Expense			$ 74,900
Proceeds from Sale of Loans Held-for-sale	$ 64,600	$ 149,600	192,700	$ 406,800
Book value of loans				$ 1,100,000
Loans, face value			267,600		$ 481,700
Gain (Loss) on Sale of Mortgage Loans		$ 2,200	$ 17,000		25,023	$ 20,830	$ 18,072
Equity contributed to securitization entity by an independent investor					16,000
Assets held for sale from discontinued operations					140,657	$ 197,831	$ 304,300
Equity Method Investments					$ 39,200