XML 40 R28.htm IDEA: XBRL DOCUMENT
v3.21.1

Share repurchases Share Repurchases (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2021
Treasury Stock, Value [Abstract] |
Class of Treasury Stock [Table Text Block] | The following table summarizes the Company's common stock repurchases during the three months ended March 31, 2021 and 2020:
| Three months ended March 31, 2021 |  | Three months ended March 31, 2020
| Shares repurchased |  | Amount paid |  | Average paid per share |  | Shares repurchased |  | Amount paid |  | Average paid per share
Open market repurchases | 2,949 |  |  | $ | 322,333 |  |  | $ | 109.28 |  |  | 4,052 |  |  | $ | 303,139 |  |  | $ | 74.81 |

X
- 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
Name: | us-gaap_ScheduleOfTreasuryStockByClassTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_TreasuryStockValueAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration