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Stock-Based Compensation (Details 2) (Stock Option, USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock Option
Stock-Based Compensation
Intrinsic value of options exercised	$ 6,878	$ 3,421	$ 6,637
Fair value of options vested	$ 1,047	$ 725	$ 1,163

X

- Definition

The total fair value of stock options vested during the reporting period.

+ References

No definition available.

+ Details

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X

- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

+ 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 (d)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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