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Stockholders' Equity (Details) - USD ($) | 1 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Aug. 31, 2019 | May 31, 2019 | Jun. 30, 2020 | Jan. 02, 2020 | Dec. 31, 2019 | May 31, 2017
Class of Stock [Line Items] |  |  |  |  |  |
Share repurchase program authorized amount |  |  |  |  |  | $ 150,000,000
Stock repurchased during period, value |  | $ 100,000,000 |  |  |  |
Treasury stock acquired (in shares) | 2,100,000 |  |  |  |  |
Shares repurchased, average cost per share (in usd per share) | $ 48.26 |  |  |  |  |
Stock repurchase program, remaining authorized repurchase amount |  |  | $ 50,000,000 |  |  |
Common stock, shares issued (in shares) |  |  | 53,297,000 |  | 51,807,000 |
Private Placement | Common Class A | Walmart Program Agreement |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |
Common stock, shares issued (in shares) |  |  |  | 975,000 |  |
Common stock, shares issued and unvested (in shares) |  |  | 812,502 |  |  |

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: 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=109259400&loc=d3e21463-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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