Shares Repurchased	6 Months Ended
Jun. 30, 2016
Equity [Abstract]
Shares Repurchased	9. Shares Repurchased On October 29, 2014, the Company’s Board of Directors authorized a three-year share repurchase program of up to $100,000. On April 27, 2016, the Board of Directors approved a $60,000 increase to the Company’s share repurchase program and extended the term through April 27, 2019. Purchases under this program will include purchases to offset future equity grants made under the Company’s equity plans and will be made in open market or privately negotiated transactions. This authority may be exercised from time to time and in such amounts as market conditions warrant, and subject to regulatory considerations. The timing and actual number of shares repurchased will depend on a variety of factors including price, corporate and regulatory requirements, market conditions and other corporate liquidity requirements and priorities. The repurchase program may be suspended or terminated at any time without prior notice. Shares repurchased under this program will be returned to the status of authorized and unissued on the Company’s books and records. During the three months ended June 30, 2016, the Company repurchased 8,018 shares of its common stock under this program for an aggregate cost of $99. During the three months ended June 30, 2015, the Company repurchased 62,470 shares of its common stock under this program for an aggregate cost of $1,195. During the six months ended June 30, 2016, the Company repurchased 3,415,323 shares of its common stock under this program for an aggregate cost of $35,654. During the six months ended June 30, 2015, the Company repurchased 835,106 shares of its common stock under this program for an aggregate cost of $15,264. As of June 30, 2016, $100,230 remains under this program for future purchases.

9. Shares Repurchased

On October 29, 2014, the Company’s Board of Directors authorized a three-year share repurchase program of up to $100,000. On April 27, 2016, the Board of Directors approved a $60,000 increase to the Company’s share repurchase program and extended the term through April 27, 2019. Purchases under this program will include purchases to offset future equity grants made under the Company’s equity plans and will be made in open market or privately negotiated transactions. This authority may be exercised from time to time and in such amounts as market conditions warrant, and subject to regulatory considerations. The timing and actual number of shares repurchased will depend on a variety of factors including price, corporate and regulatory requirements, market conditions and other corporate liquidity requirements and priorities. The repurchase program may be suspended or terminated at any time without prior notice. Shares repurchased under this program will be returned to the status of authorized and unissued on the Company’s books and records.

During the three months ended June 30, 2016, the Company repurchased 8,018 shares of its common stock under this program for an aggregate cost of $99. During the three months ended June 30, 2015, the Company repurchased 62,470 shares of its common stock under this program for an aggregate cost of $1,195.

During the six months ended June 30, 2016, the Company repurchased 3,415,323 shares of its common stock under this program for an aggregate cost of $35,654. During the six months ended June 30, 2015, the Company repurchased 835,106 shares of its common stock under this program for an aggregate cost of $15,264. As of June 30, 2016, $100,230 remains under this program for future purchases.