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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended						9 Months Ended
	Nov. 05, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Dec. 31, 2020
Subsequent Events
Quarterly cash dividends on common stock		$ 0.15	$ 0.15	$ 0.15	$ 0.13	$ 0.13	$ 0.13
Class A Common Stock
Subsequent Events
Quarterly cash dividends on common stock								$ 0.15
Subsequent Event | Class A Common Stock
Subsequent Events
Quarterly cash dividends on common stock	$ 0.16
Amount of common stock repurchase authorized									$ 100.0
Subsequent Event | Series A Preferred Stock
Subsequent Events
Dividend declared per share of Series A preferred stock	$ 0.384375

X

- Definition

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

+ 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=27012166&loc=d3e187085-122770

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

+ Details

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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- Details

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