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Stockholders' Equity (Information Relating to RSU Grants and Deliveries) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($) shares
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Total RSUs outstanding at the beginning of the period	1,156,518
RSUs granted	600,207
RSUs forfeited	(64,030)
RSUs vested	(493,007)
Total RSUs outstanding at the end of the period	1,199,688
Stock surrendered to fulfill tax withholding obligations	167,034
Restricted Stock Units Issued as Compensation
Total Fair Market Value of RSUs Issued
RSUs granted (in Dollars) | $	$ 10,941

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- Definition

Fair value of share-based awards granted during the period.

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(2)(iii)(1)
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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-Publisher FASB
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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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-Section 50
-Paragraph 2
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Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.

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