Condensed Consolidated Statements of Changes in Stockholders' Equity Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Statement of Changes in Stockholders' Equity [Abstract]
Dividends on common stock (in dollars per share)	$ 0
Deferred Compensation Arrangement with Individual, Shares Issued	5,761	4,000
Stock Issued During Period, Shares, Restricted Stock Award, Gross	25,950	25,950
Stock Issued During Period, Shares, Employee Stock Purchase Plans	782	0

Statement of Changes in Stockholders' Equity [Abstract]

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Aggregate dividends declared during the period for each share of common stock outstanding.

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Number of shares issued pursuant to the terms of a deferred compensation arrangement.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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