Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities, Contingent Liabilities (Details)			6 Months Ended	12 Months Ended
	May 06, 2020 USD ($)	Dec. 08, 2017 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2011 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	May 31, 2019 Claimant
Loss Contingencies [Abstract]
Amount of damages awarded to plaintiff		$ 7,300,000
Attorney fees		3,300,000
Incentive fees		$ 20,000
Amount of damages to be paid					$ 14,952
Reserve for losses			$ 2,900,000			$ 921,000
Number of claimants | Claimant							89
Herrington v. Waterstone Mortgage Corporation [Member]
Loss Contingencies [Abstract]
Attorney fees	$ 1,100,000			$ 4,900,000
Number of assumerd per workweek hour			50 hours
Unreimbursed expenses per workweek			$ 100
Reserve for losses					$ 1,100,000