Premises and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Premises and Equipment
Subtotal	$ 89,254	$ 71,480
Less: accumulated depreciation	24,563	18,325
Total	64,691	53,155
Depreciation expense for premises and equipment	7,700	4,900	$ 2,900
Land
Premises and Equipment
Subtotal	18,902	16,920
Premises
Premises and Equipment
Subtotal	25,361	19,868
Leasehold improvements
Premises and Equipment
Subtotal	15,824	14,025
Furniture, fixtures and equipment
Premises and Equipment
Subtotal	28,994	20,480
Automobiles
Premises and Equipment
Subtotal	$ 173	$ 187

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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