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Equity (Tables) | 6 Months Ended
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Jun. 30, 2019
Stockholders' Equity Note [Abstract] |
Schedule of share repurchase programs | The following table presents our share repurchase programs from January 1, 2018 through June 30, 2019:
Program approval date |  | Program end date |  | Authorized amount |  | Program completion date
February 2018 |  | June 30, 2018 |  | $ | 200,000 |  |  | May 14, 2018
April 2018 |  | December 31, 2018 |  | 200,000 |  |  | November 2, 2018
October 2018 |  | March 31, 2019 |  | 200,000 |  |  | January 9, 2019
December 2018 |  | March 31, 2019 |  | 100,000 |  |  | March 22, 2019
February 2019 |  | September 30, 2019 |  | 200,000 |  |  | July 22, 2019
June 2019 |  | December 31, 2019 |  | 200,000 |  |  | Not yet completed

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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 + Details
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