Fair Value, Significant Unobservable Inputs Used in Fair Value Measurement (Details) - Level 3 [Member] - Discounted Cash Flow [Member] - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Jun. 30, 2021	Dec. 31, 2020
Valuation Technique and Input, Description [Abstract]
Fair Value		$ 211,995	$ 174,414
MSRs [Member]
Valuation Technique and Input, Description [Abstract]
Fair Value		211,995	174,414
Annual cost to service, per loan	[1]	$ 76	$ 76
MSRs [Member] | Minimum [Member]
Valuation Technique and Input, Description [Abstract]
Constant prepayment speed	[2]	6.90%	5.00%
Uncollected Payments	[2]	0.30%	0.30%
MSRs [Member] | Maximum [Member]
Valuation Technique and Input, Description [Abstract]
Constant prepayment speed	[2]	25.00%	38.00%
Uncollected Payments	[2]	2.50%	2.60%
MSRs [Member] | Weighted Average [Member]
Valuation Technique and Input, Description [Abstract]
Constant prepayment speed	[1]	12.70%	15.40%
Uncollected Payments	[1]	0.70%	0.60%
Discount rate	[1]	7.00%	6.10%

[1] Weighted averages for unobservable inputs are calculated based on the unpaid principal balance of the portfolios.

[2] Significant increases (decreases) in any of the inputs in isolation may result in significantly lower (higher) fair value measurements. A change in the assumption used for discount rates may be accompanied by a directionally similar change in the assumption used for the probability of uncollected payments and a directionally opposite change in the assumption used for prepayment rates.