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Equity (Stock Repurchase Program) (Details) - USD ($) $ / shares in Units, shares in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Aug. 04, 2021 | Jul. 31, 2021
Stock repurchase program |  |  |  |
Shares repurchased and retired during period (in shares) | 1.8 | 2.5 |  |
Common stock value repurchased including acquisition costs | $ 32,400,000 | $ 27,800,000 |  |
Average cost per share of repurchased shares (in dollars per share) | $ 17.57 | $ 10.98 |  |
Stock repurchase program, authorized amount |  |  | $ 50,000,000.0 |
Maximum |  |  |  |
Stock repurchase program |  |  |  |
Stock repurchase program, authorized amount | $ 50,000,000.0 |  |  |
Stock repurchase program remaining authorized amount |  |  |  | $ 33,000,000.0

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