Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	$ 8,105	$ 7,179	$ 6,530
Core deposit intangible
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	7,965	7,048	6,399
Customer relationship intangible
Finite-Lived Intangible Assets [Line Items]
Intangible amortization	$ 140	$ 131	$ 131