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Equity (Tables)
 9 Months Ended
Sep. 30, 2021
Stockholders' Equity Note [Abstract]  
Schedule Of Stock-Based Compensation Expense By Award Type Our stock-based compensation expense is summarized as follows by award types (in thousands):
 
Three Months Ended September 30, Nine Months Ended September 30,
2021202020212020
Restricted stock units*$4,666 $6,078 $23,031 $20,855 
Common stock options82 254 402 867 
Employee stock purchase plan486 — 1,448 — 
Total stock-based compensation expense$5,234 $6,332 $24,881 $21,722 
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*    Amounts include market-based and performance-based restricted stock units.
Schedule Of Stock-Based Compensation Expense By Operating Function
The following table summarizes stock-based compensation expense by operating function for the periods presented below (in thousands): 
 Three Months Ended September 30, Nine Months Ended September 30,
 2021202020212020
Marketing and advertising$2,297 $1,869 $6,922 $5,138 
Customer care and enrollment740 527 1,901 1,762 
Technology and content2,380 1,430 7,483 2,965 
General and administrative*(183)2,506 8,575 11,857 
Total stock-based compensation expense$5,234 $6,332 $24,881 $21,722 
Amount capitalized in internal-use software772 548 1,875 1,278 
Total stock-based compensation$6,006 $6,880 $26,756 $23,000 
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*    Stock-based compensation expense for both three and nine months ended September 30, 2021 was impacted by a $4.1 million credit related to forfeited equity awards due to our chief executive officer's separation.