LHFI and Allowance for Loan Losses, LHFI - Troubled Debt Restructuring Subsequently Defaulted (Details) - Troubled Debt Restructurings that Subsequently Defaulted [Member] $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) Contract	Dec. 31, 2017 USD ($) Contract	Dec. 31, 2016 USD ($) Contract
Troubled Debt Restructurings [Abstract]
Number of Contracts | Contract	13	7	3
Recorded Investment | $	$ 15,935	$ 9,604	$ 2,154
Construction, Land Development and Other Land [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts | Contract	1
Recorded Investment | $	$ 22
Secured by 1-4 Family Residential Properties [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts | Contract	5	4	1
Recorded Investment | $	$ 734	$ 78
Commercial and Industrial Loans [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts | Contract	6	3	2
Recorded Investment | $	$ 15,178	$ 9,526	$ 2,154
Consumer Loans [Member]
Troubled Debt Restructurings [Abstract]
Number of Contracts | Contract	1
Recorded Investment | $	$ 1