Fair Values Measurements - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Amount of loans recorded under the fair value option that were delinquent or on non-accrual status	$ 0
Minimum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and leases, measurement input	0.100
Servicing Asset, Measurement Input	0.020
Other real estate owned, measurement input	0.080
Repossessed and returned assets, measurement input	0.200
Maximum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and leases, measurement input	0.300
Servicing Asset, Measurement Input	0.300
Other real estate owned, measurement input	0.300
Repossessed and returned assets, measurement input	0.300
Net (loss) gain on sales of loans and leases | Loans held-for-sale
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Net gain from initial measurement of the correspondent lending loans held for sale and subsequent changes in fair value for loans outstanding	$ 27,900	$ 10,000	$ 4,900