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Stock-Based Compensation (Details 2)	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Outstanding options
Number outstanding (in shares) | shares	6,381,576
Weighted-average remaining contractual life	3 years 6 months 26 days
Weighted-average exercise price (in dollars per share)	$ 9.97
Exercisable options
Number outstanding (in shares) | shares	3,739,257
Weighted-average exercise price (in dollars per share)	$ 8.13
$6.34 to $9.52
Information about stock options outstanding
Low end of exercise price range (in dollars per share)	6.34
High end of exercise price range (in dollars per share)	$ 9.52
Outstanding options
Number outstanding (in shares) | shares	3,330,058
Weighted-average remaining contractual life	2 years 2 months 5 days
Weighted-average exercise price (in dollars per share)	$ 7.71
Exercisable options
Number outstanding (in shares) | shares	3,083,777
Weighted-average exercise price (in dollars per share)	$ 7.62
$9.53 to $14.36
Information about stock options outstanding
High end of exercise price range (in dollars per share)	$ 14.36
Outstanding options
Number outstanding (in shares) | shares	2,878,346
Weighted-average remaining contractual life	5 years 4 days
Weighted-average exercise price (in dollars per share)	$ 12.20
Exercisable options
Number outstanding (in shares) | shares	654,480
Weighted-average exercise price (in dollars per share)	$ 10.52
$14.41 to $18.61
Information about stock options outstanding
High end of exercise price range (in dollars per share)	$ 18.61
Outstanding options
Number outstanding (in shares) | shares	173,172
Weighted-average remaining contractual life	6 years 4 months 17 days
Weighted-average exercise price (in dollars per share)	$ 16.34
Exercisable options
Number outstanding (in shares) | shares	1,000
Weighted-average exercise price (in dollars per share)	$ 14.41

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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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-Name Accounting Standards Codification
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