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Stock-Based Compensation (Details 3)	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Options Outstanding
Number Of Options (in shares) | shares	730,605
Weighted-Average Exercise Price (in dollars per share)	$ 16.40
Weighted-Average Remaining Contractual Term	3 years 7 months 6 days
Options Exercisable
Number Of Options (in shares) | shares	698,303
Weighted-Average Exercise Price (in dollars per share)	$ 16.01
Range Of Exercise Prices From Dollars 3.65 To 9.00
Stock options outstanding
Exercise price, low end of range (in dollars per share)	3.65
Exercise price, high end of range (in dollars per share)	$ 9.00
Options Outstanding
Number Of Options (in shares) | shares	42,923
Weighted-Average Exercise Price (in dollars per share)	$ 3.90
Weighted-Average Remaining Contractual Term	7 months 6 days
Options Exercisable
Number Of Options (in shares) | shares	42,923
Weighted-Average Exercise Price (in dollars per share)	$ 3.90
Range Of Exercise Prices From Dollars 9.01 To 18.00
Stock options outstanding
Exercise price, low end of range (in dollars per share)	9.01
Exercise price, high end of range (in dollars per share)	$ 18.00
Options Outstanding
Number Of Options (in shares) | shares	497,116
Weighted-Average Exercise Price (in dollars per share)	$ 14.62
Weighted-Average Remaining Contractual Term	3 years 2 months 12 days
Options Exercisable
Number Of Options (in shares) | shares	497,116
Weighted-Average Exercise Price (in dollars per share)	$ 14.62
Range Of Exercise Prices From Dollars 18.01 To 24.68
Stock options outstanding
Exercise price, low end of range (in dollars per share)	18.01
Exercise price, high end of range (in dollars per share)	$ 24.68
Options Outstanding
Number Of Options (in shares) | shares	190,566
Weighted-Average Exercise Price (in dollars per share)	$ 23.85
Weighted-Average Remaining Contractual Term	5 years 1 month 6 days
Options Exercisable
Number Of Options (in shares) | shares	158,264
Weighted-Average Exercise Price (in dollars per share)	$ 23.68

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (g)
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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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