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Treasury Stock - Narrative (Details) - USD ($)	Dec. 31, 2018	Oct. 30, 2018
Equity, Class of Treasury Stock [Line Items]
Share value available for repurchase	$ 4,400,000
Share Repurchase Program - Authorized October 30, 2018
Equity, Class of Treasury Stock [Line Items]
Amount of common stock authorized for purchase under repurchase plan		$ 5,000,000.0

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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