Supplemental Financial Data (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Supplemental Financial Data
Realized gains	$ 7,377	$ 6,946	$ 20,914	$ 27,796
Unrealized gains	(7,881)	8,500	(21,799)	15,964
Income before provision for income taxes	9,782	18,464	45,516	56,094
Income on unconsolidated joint ventures	$ 1,047	2,178	$ 6,059	9,420
WFLLA LLC
Supplemental Financial Data
Ownership percentage	50.00%		50.00%
Girod HoldCo, LLC
Supplemental Financial Data
Interest income	$ 1,108	4,990	$ 5,943	17,255
Realized gains	364	2,529	995	18,567
Unrealized gains	2,074	3,688	18,442	8,193
Servicing expense and other	(1,224)	(2,472)	(3,581)	(6,236)
Income before provision for income taxes	2,322	8,735	21,799	37,779
WFLLA LLC
Supplemental Financial Data
Interest income	553	2,490	2,966	8,610
Realized gains	182	1,262	497	9,265
Unrealized gains	1,035	1,840	9,203	4,088
Servicing expense and other	(615)	(1,236)	(1,792)	(3,123)
Income before provision for income taxes	1,155	4,356	10,874	18,840
Income on unconsolidated joint ventures	$ 578	$ 2,178	$ 5,437	$ 9,420
WFLLA LLC \| Girod HoldCo, LLC
Supplemental Financial Data
Ownership percentage	49.90%		49.90%
Other Unconsolidated Joint Ventures
Supplemental Financial Data
Income on unconsolidated joint ventures	$ 469		$ 622

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