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Consolidated Statements of Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]
Dividends declared (USD per share)	$ 0.20	$ 0.20	$ 0.20
Cash dividends per share of common stock (USD per share)	$ 0.20	$ 0.20	$ 0.20
Repurchase of Class A Common shares		180,541	1,813,249
Shares issued on compensation plan	767,393	471,198	851,011
Tax payments related to shares withheld for vested stock and RSUs	$ 2,881	$ 3,831	$ 3,796

X

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Amount of decrease to equity for grantee's tax withholding obligation for award under share-based payment arrangement.

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

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

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Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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