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v3.21.2

Stockholders' Equity - Schedule of Common Stock (Details) - shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Shares issued beginning balance (in shares) | 65,881,233 | 68,470,050 | 66,456,663 | 69,065,491
Repurchase of common stock (in shares) | (181,250) | (1,419,984) | (925,251) | (2,167,401)
Awards effectively repurchased for required employee withholding taxes (in shares) | (49,391) | (67,491) | (117,619) | (118,617)
Shares issued ending balance (in shares) | 65,864,116 | 67,292,864 | 65,864,116 | 67,292,864
Issuance of common stock from vested restricted stock units |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Issuance of common stock from vested restricted stock units (in shares) | 130,560 | 168,621 | 346,518 | 342,250
Issuance of common stock from exercise of stock options |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Issuance of common stock from exercise of stock options (in shares) | 8,894 | 11,136 | 29,735 | 40,609
Issuance of common stock for employee stock purchase plan |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Issuance of common stock for employee stock purchase plan (in shares) | 74,070 | 130,532 | 74,070 | 130,532

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- Definition Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123467817&loc=d3e21463-112644 + Details
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