Transfers of Financial Assets Servicing Assets at Amortized Cost Roll Forward (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Servicing Asset at Amortized Cost, Balance [Roll Forward]
Beginning balance	$ 21,215	$ 25,139	$ 24,466
Additions	3,587	4,459	9,249
Amortization	(7,318)	(8,383)	(8,576)
Ending balance	$ 17,484	$ 21,215	$ 25,139