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Shares Repurchased	9 Months Ended
	Sep. 30, 2015
Equity [Abstract]
Shares Repurchased	10. Shares Repurchased On October 29, 2014, the Company’s Board of Directors authorized a three-year share repurchase program of up to $100 million. During the three months ended September 30, 2015, the Company repurchased 330 shares of its common stock under this program for an aggregate cost of $8,424. During the nine months ended September 30, 2015, the Company repurchased 1,165 shares of its common stock under this program for an aggregate cost of $23,689. Of these shares, 278 were repurchased to offset tax withholding obligations that occur upon vesting and release of restricted shares for an aggregate cost of $4,842, and 887 shares were repurchased in the open market to offset new shares issued in connection with employee equity grants for an aggregate cost of $18,847. $76,311 remains under this program for future purchases. During three and nine months ended September 30, 2014, the Company repurchased 80 and 392 shares of its common stock to offset tax withholding obligations that occur upon vesting and release of restricted shares for an aggregate cost of $834 and $6,259.

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- Definition

The entire disclosure for treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock.

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