Equity and dividends (Schedule of Quarterly Dividends Declared and Paid) (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021
Fourth quarter 2021
Dividends Payable [Line Items]
Dividend per share	$ 0.2500
Total dividends	$ 27,659
Fourth quarter 2020
Dividends Payable [Line Items]
Dividend per share		$ 0.2200
Total dividends		$ 24,181
First quarter 2022
Dividends Payable [Line Items]
Dividend per share	$ 0.2500
Total dividends	$ 27,693
First Quarter 2021
Dividends Payable [Line Items]
Dividend per share		$ 0.2200
Total dividends		$ 24,279
Second quarter 2022
Dividends Payable [Line Items]
Dividend per share	$ 0.2700
Total dividends	$ 29,932
Second quarter 2021
Dividends Payable [Line Items]
Dividend per share		$ 0.2500
Total dividends		$ 27,607

Aggregate dividends declared during the period for each share of common stock outstanding.

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- Definition

Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 405
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6957935&loc=d3e64057-112817

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- Definition

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+ References

No definition available.

+ Details

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