Mortgage Banking (Additional Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Servicing Assets at Fair Value [Line Items]
Gain (Loss) on Sale of Mortgage Loans	$ 15,328	$ 6,365	$ 5,451
Receivables Held-for-sale, Amount	40,500	11,900
Unrealized Gain (Loss) on Derivatives	1,100	(61)
Unrealized gain (loss) on loans held for sale	1,100	(150)	52
Fees and Commissions, Mortgage Banking and Servicing	18,487	7,837	5,914
Servicing Asset at Amortized Cost	$ 2,196	$ 877	831	$ 1,025
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed	19.00%	14.40%
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate	10.10%	11.20%
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Prepayment Speed	$ 140
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Prepayment Speed	268
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 10 Percent Adverse Change in Discount Rate	68
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of 20 Percent Adverse Change in Discount Rate	133
Capitalized servicing right fees upon sale(1)	1,763	$ 263	0
Fixed Rate Residential Mortgage [Member]
Servicing Assets at Fair Value [Line Items]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Cost of Mortgage Sold	625,500	271,800	205,900
Forward Contracts [Member]
Servicing Assets at Fair Value [Line Items]
Unrealized Gain (Loss) on Derivatives	(182)	282	(127)
Servicing Assets
Servicing Assets at Fair Value [Line Items]
Mortgage loans serviced during period, value	401,600	227,800
Fees and Commissions, Mortgage Banking and Servicing	$ 1,000	$ 898	$ 949