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Repurchases of Common Stock (Tables) | 6 Months Ended
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Jun. 30, 2019
Equity [Abstract] |
Schedule of common stock repurchases | The following is a summary of our open market common stock repurchases, reported on a trade date basis, and shares acquired through employee surrender:
(in thousands, except per share amounts) | For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
﻿ | 2019 |  | 2018 |  | 2019 |  | 2018
﻿ |  |  |  |  |  |  |  |  |
Shares repurchased in the open market | 86 |  |  | 517 |  |  | 353 |  |  | 982 |
Shares acquired through employee surrender for statutory tax withholding | 1 |  |  | 1 |  |  | 37 |  |  | 49 |
Total shares repurchased | 87 |  |  | 518 |  |  | 390 |  |  | 1,031 |
﻿ |  |  |  |  |  |  |
Cost of shares repurchased in the open market | $ | 20,285 |  |  | $ | 105,774 |  |  | $ | 74,147 |  |  | $ | 191,962 |
Cost of shares for employee surrenders | 169 |  |  | 165 |  |  | 7,572 |  |  | 8,720 |
Total cost of shares | $ | 20,454 |  |  | $ | 105,939 |  |  | $ | 81,719 |  |  | $ | 200,682 |
﻿ |  |  |  |  |  |  |
Average cost per share - open market repurchases | $ | 235.94 |  |  | $ | 204.69 |  |  | $ | 209.81 |  |  | $ | 195.47 |
Average cost per share - employee surrenders | $ | 249.77 |  |  | $ | 215.36 |  |  | $ | 207.16 |  |  | $ | 179.41 |
Average cost per share - total | $ | 236.04 |  |  | $ | 204.71 |  |  | $ | 209.56 |  |  | $ | 194.71 |

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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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