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Equity - Stock Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Aug. 31, 2020
Class of Stock [Line Items]
Stock repurchased during period (shares)	2.5	6.2
Common stock value repurchased including acquisition costs	$ 27,800,000	$ 58,300,000
Average cost per share of repurchased shares (in dollars per share)	$ 10.98	$ 9.42
Stock repurchase program remaining authorized amount	$ 6,400,000
Subsequent event
Class of Stock [Line Items]
Stock repurchase program, authorized amount			$ 50,000,000.0

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Common Stock Acquired, Average Cost Per Share

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- Definition

Common Stock Value Acquired Including Acquisition Costs

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- Definition

Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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