Stock-Based Compensation (Details 2) shares in Thousands	12 Months Ended
Dec. 31, 2018 $ / shares shares
$9.00
Summarized information about outstanding and exercisable stock option
Shares outstanding (in shares) \| shares	68
Weighted average remaining contractual price	1 year 1 month 20 days
Weighted average exercise price (usd per share)	$ 9.00
Shares exercisable \| shares	68
Weighted average exercise price (usd per share)	$ 9.00
$13.22 - $15.00
Summarized information about outstanding and exercisable stock option
Range of exercise prices, Lower limit	13.22
Range of exercise prices, Upper limit	$ 15.00
Shares outstanding (in shares) \| shares	615
Weighted average remaining contractual price	2 years 1 month 17 days
Weighted average exercise price (usd per share)	$ 14.98
Shares exercisable \| shares	3
Weighted average exercise price (usd per share)	$ 13.22
$19.71 - $22.70
Summarized information about outstanding and exercisable stock option
Range of exercise prices, Lower limit	19.71
Range of exercise prices, Upper limit	$ 22.70
Shares outstanding (in shares) \| shares	727
Weighted average remaining contractual price	1 year 1 month 5 days
Weighted average exercise price (usd per share)	$ 21.92
Shares exercisable \| shares	706
Weighted average exercise price (usd per share)	$ 21.93
$23.40 - $29.68
Summarized information about outstanding and exercisable stock option
Range of exercise prices, Lower limit	23.4
Range of exercise prices, Upper limit	$ 29.68
Shares outstanding (in shares) \| shares	1,815
Weighted average remaining contractual price	3 years 10 months 28 days
Weighted average exercise price (usd per share)	$ 26.79
Shares exercisable \| shares	556
Weighted average exercise price (usd per share)	$ 24.65

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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.

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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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