Premises and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 90,482	$ 67,445
Accumulated depreciation and amortization	31,365	29,179
Total	59,117	38,266
Depreciation Expense	3,011	2,655	$ 2,495
Land
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	14,734	9,933
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	52,129	37,229
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	19,718	16,145
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,580	4,109
Construction in progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 321	$ 29