XML 67 R50.htm IDEA: XBRL DOCUMENT
v3.20.4

Earnings Per Common Share (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Earnings Per Share [Abstract] |
Schedule of computation of basic and diluted earnings per common share | The following table sets forth the computation of basic and diluted earnings per common share:
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
Numerator: |  |  |  |  |
Net income | $ | 1,465,711 |  |  | $ | 1,693,300 |  |  | $ | 727,821 |
Amounts attributable to noncontrolling interests | (60,190) |  |  | (56,981) |  |  | 30,150 |
Net income available to Arch | 1,405,521 |  |  | 1,636,319 |  |  | 757,971 |
Preferred dividends | (41,612) |  |  | (41,612) |  |  | (41,645) |
Loss on redemption of preferred shares | — |  |  | — |  |  | (2,710) |
Net income available to Arch common shareholders | $ | 1,363,909 |  |  | $ | 1,594,707 |  |  | $ | 713,616 |
Denominator: |  |  |  |  |
Weighted average common shares outstanding | 403,062,179 |  |  | 401,802,815 |  |  | 401,036,376 |
Series D preferred securities (1) | — |  |  | — |  |  | 3,311,245 |
Weighted average common shares outstanding – basic | 403,062,179 |  |  | 401,802,815 |  |  | 404,347,621 |
Effect of dilutive common share equivalents: |  |  |  |  |
Nonvested restricted shares | 1,682,309 |  |  | 1,673,770 |  |  | 1,474,207 |
Stock options (2) | 5,514,967 |  |  | 8,132,893 |  |  | 7,084,650 |
Weighted average common shares and common share equivalents outstanding – diluted | 410,259,455 |  |  | 411,609,478 |  |  | 412,906,478 |
Earnings per common share: |  |  |  |  |
Basic | $ | 3.38 |  |  | $ | 3.97 |  |  | $ | 1.76 |
Diluted | $ | 3.32 |  |  | $ | 3.87 |  |  | $ | 1.73 |
(1) The company has determined that, based on a review of the terms, features and rights of the Company’s non-voting common equivalent preferred shares compared to the rights of the Company’s common shareholders, the underlying common shares that the convertible securities convert to were common share equivalents at the time of their issuance. (2) Certain stock options were not included in the computation of diluted earnings per share where the exercise price of the stock options exceeded the average market price and would have been anti-dilutive or where, when applying the treasury stock method to in-the-money options, the sum of the proceeds, including unrecognized compensation, exceeded the average market price and would have been anti-dilutive. For 2020, 2019 and 2018, the number of stock options excluded were 2,249,821, 1,302,017 and 5,673,821, respectively.

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

X
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration