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SUBSEQUENT EVENT	3 Months Ended
SUBSEQUENT EVENT	Mar. 31, 2014
Subsequent Events [Abstract]
SUBSEQUENT EVENT	15. SUBSEQUENT EVENT On April 29, 2014, the Company sold 2,650,000 shares of common stock at an offering price of $38.00 per share. In addition, the Company has granted the underwriters an option to purchase an additional 397,500 shares of common stock at a price of $38.00 per share. The Company received aggregate net proceeds of approximately $94.5 million, after deducting the underwriting discounts and offering related transaction costs.