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Stock-Based Compensation (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013
Options Outstanding
Number Of Options (in shares)	1,147,320
Weighted-Average Exercise Price (in dollars per share)	$ 13.21
Weighted-Average Remaining Contractual Term	5 years 1 month 6 days
Options Exercisable
Number Of Options (in shares)	899,406
Weighted-Average Exercise Price (in dollars per share)	$ 10.91
Exercise Price Ranges, $3.65-$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)	340,522
Weighted-Average Exercise Price (in dollars per share)	$ 3.72
Weighted-Average Remaining Contractual Term	2 years 6 months
Options Exercisable
Number Of Options (in shares)	340,522
Weighted-Average Exercise Price (in dollars per share)	$ 3.72
Exercise Price Ranges, $9.01-$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)	586,817
Weighted-Average Exercise Price (in dollars per share)	$ 14.69
Weighted-Average Remaining Contractual Term	5 years 3 months 18 days
Options Exercisable
Number Of Options (in shares)	492,929
Weighted-Average Exercise Price (in dollars per share)	$ 14.16
Exercise Price Ranges, $18.01-$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)	219,981
Weighted-Average Exercise Price (in dollars per share)	$ 23.92
Weighted-Average Remaining Contractual Term	8 years 3 months 18 days
Options Exercisable
Number Of Options (in shares)	65,955
Weighted-Average Exercise Price (in dollars per share)	$ 23.76

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

+ 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 (c)(1)(iii)

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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

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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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 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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