Loans and Allowance for Credit Losses - Related Party Loan Schedule (Details) - Directors and Executive Officers - Related Party Loans - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Loans and Leases Receivable, Related Parties [Roll Forward]
Balance at January 1,	$ 52,368	$ 167,884
Additions	30,920	30,153
Repayments	(10,332)	(38,204)
Additions due to Changes in Related Parties	0	9,034
Deletions due to Changes in Related Parties	0	(116,499)
Balance at December 31,	$ 72,956	$ 52,368