Shares Repurchased	12 Months Ended
Dec. 31, 2016
Equity [Abstract]
Shares Repurchased	14. 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. Included under this program are purchases to offset future equity grants made under the Company’s equity plans and are 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 depends 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 are returned to the status of authorized and unissued on the Company’s books and records. During the years ended December 31, 2016, 2015 and 2014, the Company repurchased 3,778,932 shares, 1,190,356 shares and 415,834 shares of its common stock, respectively, under this program for an aggregate cost of $39,379, $24,116 and $6,531, respectively. As of December 31, 2016, $96,505 remains under this program for future purchases.

14. 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. Included under this program are purchases to offset future equity grants made under the Company’s equity plans and are 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 depends 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 are returned to the status of authorized and unissued on the Company’s books and records.

During the years ended December 31, 2016, 2015 and 2014, the Company repurchased 3,778,932 shares, 1,190,356 shares and 415,834 shares of its common stock, respectively, under this program for an aggregate cost of $39,379, $24,116 and $6,531, respectively.

As of December 31, 2016, $96,505 remains under this program for future purchases.