XML 53 R30.htm IDEA: XBRL DOCUMENT
v3.22.4

Net Income Per Common Share (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Earnings Per Share [Abstract] |
Net Income Per Common Share [Table Text Block] | The following table sets forth the computation of basic and diluted net income per common share:
| Year Ended December 31
| 2022 |  | 2021 |  | 2020
| (thousands, except per-share data)
Net income | $ | 857,658 |  |  | $ | 712,486 |  |  | $ | 174,979 |
Weighted average common shares outstanding during the period (for basic calculation) | 39,526 |  |  | 39,420 |  |  | 39,277 |
Dilutive effect of other potential common shares | 246 |  |  | 226 |  |  | 154 |
Weighted average common shares and potential common shares (for diluted calculation) | 39,772 |  |  | 39,646 |  |  | 39,431 |
Net income per common share - Basic | $ | 21.70 |  |  | $ | 18.07 |  |  | $ | 4.45 |
Net income per common share - Diluted | $ | 21.56 |  |  | $ | 17.97 |  |  | $ | 4.44 |

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 https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
Name: | us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration