Loans and Allowance for Credit Losses - Schedule of Number of Loans Modified (Details)	3 Months Ended
	Mar. 31, 2019 TDR
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified	1
Modified Terms and/or Other Concessions
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified	1
Commercial and Industrial
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified	1
Commercial and Industrial | Modified Terms and/or Other Concessions
Accounts Notes And Loans Receivable [Line Items]
Number of Loans Modified	1