Fair Value Disclosures (Details 2) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Impaired loans
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]
Asset measured on nonrecurring basis, carrying value	$ 145,400	$ 32,200
Asset measured on nonrecurring basis, specific valuation allowance	35,800	2,300
Asset measured on nonrecurring basis, reported fair value	109,600	29,900
OREO
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]
Asset measured on nonrecurring basis, carrying value	$ 0	$ 79
Measurement Input, Discount Rate
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]
Asset-Backed Securities, Measurement Input	0.0299	0.0421
Asset-Backed Securities, Term	7 years	9 years 2 months 12 days
Loans Held-for-sale, Measurement Input	0.941	0.929
Measurement Input, Discount Rate | CRT Securities
Fair Value Assets Measured On Non Recurring Basis Unobservable Input Reconciliation [Line Items]
Asset-Backed Securities, Measurement Input	0.0454
Asset-Backed Securities, Term	9 years 3 months 18 days