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Stockholders' Equity - Stock Repurchase Program (Details) - shares			3 Months Ended		9 Months Ended
	Mar. 12, 2020	Oct. 23, 2014	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Class of Stock [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			222,818	108,501	140,217	70,372
Stockholders Equity (Textual) [Abstract]
Total Stock Repurchased During Period, Shares					795,700
Eleventh Stock Repurchase Plan
Stockholders Equity (Textual) [Abstract]
Outstanding share percent		5.00%
Outstanding common shares in the plan (in shares)		1,513,000
Twelfth Stock Repurchase Plan [Member] [Member] [Domain]
Stockholders Equity (Textual) [Abstract]
Outstanding share percent	5.00%
Outstanding common shares in the plan (in shares)	1,799,054
Eleventh Stock Repurchase Plan
Stockholders Equity (Textual) [Abstract]
Number of shares repurchased (in shares)				264,712	639,922	292,712
Twelfth Stock Repurchase Plan [Member] [Member] [Domain]
Stockholders Equity (Textual) [Abstract]
Number of shares repurchased (in shares)			0		155,778

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- Definition

Stock repurchase program percentage of outstanding shares authorized for repurchase.

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Stockholders Equity (Textual) [Abstract]

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Total Stock Repurchased During Period, Shares

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of shares authorized for issuance under share-based payment arrangement.

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-Name Accounting Standards Codification
-Topic 718
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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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