Fair Value of Assets and Liabilities - Additional Information about Servicing Assets and Liabilities Measured Using Different Market Servicing Rates and Different Prepayment (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change in rate	0.10%	0.10%
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Weighted-average market servicing rate assumptions, servicing assets	0.66%	0.66%
Assets, servicing rate increase by .1%	$ (9,174)	$ (13,978)
Assets, servicing rate decrease by .1%	$ 9,175	$ 13,979