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Subsequent Events	12 Months Ended
Subsequent Events	Dec. 31, 2013
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS On January 1, 2014, shares issuable under the Company’s 2010 Employee Stock Purchase Plan increased by 524,699 shares and shares issuable under the Company’s 2010 Plan increased by 2,361,145 shares in accordance with the automatic annual increase provisions of such plans. No shares have been issued under the 2010 Employee Stock Purchase Plan. During January and February 2014, the Board of Directors granted stock options to purchase 284,670 shares of common stock at a weighted-average exercise price of $55.51 per share. The stock options vest over four years. During January and February 2014, the Board of Directors granted restricted stock units for 10,500 shares of common stock which vest over annually over four years.