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Common Stock | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Common Stock | Common Stock There were approximately 3,696 and 3,633 common shares outstanding at December 31, 2020 and 2019, respectively. We made the following share repurchases during the years indicated:
|  | Year Ended December 31,
|  | 2020 |  | 2019 |  | 2018
Aggregate purchase price |  | $ | 371,078 |  |  | $ | 698,417 |  |  | $ | 846,134 |
Number of shares repurchased |  | 96 |  |  | 221 |  |  | 301 |
We issue shares from the treasury account for all equity plan activity. We issued 159, 276 and 188 such shares during 2020, 2019 and 2018, respectively.

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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(e)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -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 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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