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Stockholders' Equity
 6 Months Ended
Jun. 30, 2021
Stockholders' Equity Note [Abstract]  
Stockholders' Equity Stockholders’ Equity
Share Repurchase Program

Effective November 2018, the board of directors of the Company authorized a $1.1 billion share repurchase program through December 2021. During the three and six months ended June 30, 2021, the Company repurchased 0.9 million and 1.5 million shares of its common stock, respectively, for $96.2 million and $154.4 million, respectively. The Company's goals for the share repurchase program are to offset the dilution created by its employee equity compensation programs over time and provide the flexibility to return capital to shareholders as business and market conditions warrant.

Stock-Based Compensation

The following table summarizes stock-based compensation included in the Company’s consolidated statements of income for the three and six months ended June 30, 2021 and 2020 (in thousands):
 
 For the Three Months
Ended June 30, 		For the Six Months
Ended June 30,
2021202020212020
Cost of revenue$6,874 $6,254 $13,970 $11,990 
Research and development15,937 11,549 34,306 23,614 
Sales and marketing11,547 16,011 24,025 31,746 
General and administrative16,123 15,377 32,485 29,334 
Total stock-based compensation50,481 49,191 104,786 96,684 
Provision for income taxes(15,518)(16,823)(28,562)(29,459)
Total stock-based compensation, net of income taxes$34,963 $32,368 $76,224 $67,225 

In addition to the amounts of stock-based compensation reported in the table above, the Company’s consolidated statements of income for the three and six months ended June 30, 2021 include stock-based compensation reflected as a component of amortization of capitalized internal-use software of $8.9 million and $16.6 million, respectively, before taxes, and for the three and six months ended June 30, 2020 include stock-based compensation reflected as a component of amortization of capitalized internal-use software of $7.2 million and $14.8 million, respectively, before taxes.