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v3.21.1

Capital and Reserves - Common stock and additional paid-in capital (Details) - shares | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of share capital, reserves and other equity interest [Line Items] |  |  |
Authorized | 280,000,000 |  |
Beginning Balance (in Shares) | 39,602,277 | 39,538,550 | 39,428,834
Conversions | 0 | 0 | 0
Repurchased common stock | (1) | 0 | (99,257)
Restricted stock issued - directors | 63,000 | 57,000 | 57,000
Exercised stock options - compensation plans |  |  | 102,918
Restricted stock units - vested | 12,664 | 6,727 | 49,055
Ending Balance (in Shares) | 39,677,940 | 39,602,277 | 39,538,550
Class A shares [Member] |  |  |
Disclosure of share capital, reserves and other equity interest [Line Items] |  |  |
Authorized | 40,000,000 |  |
Beginning Balance (in Shares) | 6,342,189 | 6,342,189 | 6,342,189
Conversions | 0 | 0 | 0
Repurchased common stock | 0 | 0 | 0
Restricted stock issued - directors | 0 | 0 | 0
Exercised stock options - compensation plans |  |  | 0
Restricted stock units - vested | 0 | 0 | 0
Ending Balance (in Shares) | 6,342,189 | 6,342,189 | 6,342,189
Class B shares [Member] |  |  |
Disclosure of share capital, reserves and other equity interest [Line Items] |  |  |
Authorized | 40,000,000 |  |
Beginning Balance (in Shares) | 2,182,426 | 2,245,226 | 2,408,805
Conversions | (4,060) | (62,799) | (64,386)
Repurchased common stock | (1) | (1) | (99,193)
Restricted stock issued - directors | 0 | 0 | 0
Exercised stock options - compensation plans |  |  | 0
Restricted stock units - vested | 0 | 0 | 0
Ending Balance (in Shares) | 2,178,365 | 2,182,426 | 2,245,226
Class E shares [Member] |  |  |
Disclosure of share capital, reserves and other equity interest [Line Items] |  |  |
Authorized | 100,000,000 |  |
Beginning Balance (in Shares) | 31,077,662 | 30,951,135 | 30,677,840
Conversions | 4,060 | 62,799 | 64,386
Repurchased common stock | 0 | 1 | (64)
Restricted stock issued - directors | 63,000 | 57,000 | 57,000
Exercised stock options - compensation plans |  |  | 102,918
Restricted stock units - vested | 12,664 | 6,727 | 49,055
Ending Balance (in Shares) | 31,157,386 | 31,077,662 | 30,951,135
Class F shares [Member] |  |  |
Disclosure of share capital, reserves and other equity interest [Line Items] |  |  |
Authorized | 100,000,000 |  |
Beginning Balance (in Shares) | 0 | 0 | 0
Conversions | 0 | 0 | 0
Repurchased common stock | 0 | 0 | 0
Restricted stock issued - directors | 0 | 0 | 0
Exercised stock options - compensation plans |  |  | 0
Restricted stock units - vested | 0 | 0 | 0
Ending Balance (in Shares) | 0 | 0 | 0

X
- Definition The number of shares converted. + References No definition available. + Details
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- References No definition available. + Details
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- Definition The repurchase of ordinary shares. + References No definition available. + Details
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- Definition The restricted shares issued to directors. + References No definition available. + Details
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- Definition The vested restricted shares. + References No definition available. + Details
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- Definition The number of shares authorised. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 79 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_79_a_i&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 79 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_79_a_iv&doctype=Standard -URIDate 2020-01-01 + Details
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