Loans and Allowance for Credit Losses - Summary of Originated and ANCI Loans that Were Modified Into TDRs (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($) TDR
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR	1
Recorded Investment | $	$ 24,369
Commercial and Industrial
Financing Receivable Modifications [Line Items]
Number of TDRs | TDR	1
Recorded Investment | $	$ 24,369