Securities - Additional Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2020 USD ($) security item	Dec. 31, 2019 USD ($)	Sep. 30, 2019 item
Additional Information
The number of holdings of securities of any one issuer other than the U.S. Government and its sponsored entities | security	0
Holdings of securities as percentage of shareholders' equity, considered as threshold for disclosure purpose	10.00%
Number of securities held | item			421
Number of available for sale securities held | item	122
Number of held to maturity securities held | item	299
12 Months or More		$ 88,128
Total unrealized loss for securities less than 12 months	$ (1)
Available-for-sale securities carried with an unrealized loss for over 12 months		27,534
Held-to-maturity securities carried with an unrealized loss for over 12 months		$ 88,128