Stock-Based Compensation (Details 2) shares in Thousands	12 Months Ended
Dec. 31, 2020 $ / shares shares
$13.22 - $15.40
Summarized information about outstanding and exercisable stock option
Range of exercise prices, Lower limit	$ 13.22
Range of exercise prices, Upper limit	$ 15.40
Shares outstanding (in shares) \| shares	914
Weighted average remaining contractual price	2 years 8 months 15 days
Weighted average exercise price (usd per share)	$ 14.88
Shares exercisable \| shares	568
Weighted average exercise price (usd per share)	$ 14.92
$20.01 - $22.70
Summarized information about outstanding and exercisable stock option
Range of exercise prices, Lower limit	20.01
Range of exercise prices, Upper limit	$ 22.70
Shares outstanding (in shares) \| shares	40
Weighted average remaining contractual price	6 months 18 days
Weighted average exercise price (usd per share)	$ 22.07
Shares exercisable \| shares	40
Weighted average exercise price (usd per share)	$ 22.07
$25.31 - $29.68
Summarized information about outstanding and exercisable stock option
Range of exercise prices, Lower limit	25.31
Range of exercise prices, Upper limit	$ 29.68
Shares outstanding (in shares) \| shares	1,519
Weighted average remaining contractual price	2 years 5 months 26 days
Weighted average exercise price (usd per share)	$ 28.05
Shares exercisable \| shares	1,334
Weighted average exercise price (usd per share)	$ 27.82

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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