Fair Values Measurements - Narrative (Details)	3 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 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		$ 0
Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Swap agreement, measurement input	0.14
Prepayment rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Swap agreement, measurement input	0.04
Minimum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and leases, measurement input	0.10
Loan servicing rights, measurement input	0.10
Other real estate owned, measurement input	0.08
Maximum | Discount rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Loans and leases, measurement input	0.30
Loan servicing rights, measurement input	0.14
Other real estate owned, measurement input	0.30
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	$ 15,200,000	$ 2,200,000
Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Liabilities	$ 0		$ 0