Mortgage Servicing Rights - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Impairment losses on mortgage servicing rights			$ 14,522,000	$ 0	$ 1,836,000
Bank Servicing
Disaggregation of Revenue [Line Items]
Revenue	$ 2,990,000	$ 2,481,000	$ 5,612,000	$ 4,735,000