Equity - Dividends on Common Stock (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020
Dividends on common stock
Dividends declared per share	$ 0.265	$ 0.265	$ 0.265	$ 0.25	$ 0.25	$ 0.25
Dividends payment date	Oct. 15, 2021	Jul. 15, 2021	Apr. 15, 2021
Dividends payable as of record date	$ 25,714	$ 25,714	$ 25,633	$ 23,934	$ 23,931	$ 23,931
Dividends record date	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021

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

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Date the declared dividend will be paid, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=123431023&loc=d3e4304-108586

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- Definition

Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK).

+ 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

Date the holder must own the stock to be entitled to the dividend, in YYYY-MM-DD format.

+ References

No definition available.

+ Details

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