XML 63 R47.htm IDEA: XBRL DOCUMENT
v3.20.4

Shareholders' Equity (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Stockholders' Equity Note [Abstract] |
Rollforward of Common Stock Issued and Outstanding | The following table is a summary of changes in common shares issued and outstanding:
| Year ended December 31, | 2020 |  | 2019 |  | 2018 |
| (thousands of shares) |  |  |  |  |  |
| Beginning balance | 44,148 |  |  | 42,207 |  |  | 40,024 |  |
| Issuance of shares | 6,777 |  |  | 1,739 |  |  | 1,947 |  |
| Repurchase of shares | (406) |  |  | — |  |  | — |  |
| Exercise of options and issuance of restricted stock awards | 292 |  |  | 202 |  |  | 236 |  |
| Ending balance | 50,811 |  |  | 44,148 |  |  | 42,207 |  |

X
- Definition Tabular disclosure of the change in common stock outstanding. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCommonStockOutstandingRollForwardTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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