Stockholders' Equity and EPS - Stock Repurchase Programs (Details) - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Oct. 24, 2019
Equity and Earnings Per Share [Abstract]
Amount of outstanding common stock authorized to be repurchased				$ 350,000,000
Common stock repurchased (in shares)	244,223
Common stock repurchased	$ 60,020,000	$ 352,511,000	$ 147,123,000

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate 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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