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Employee Stock-Based Compensation and Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions The Company used the Black-Scholes model to estimate the fair value of the 2015 ESPP awards with the following weighted-average assumptions:
Year Ended December 31,
202120202019
Expected volatility factor
0.27 - 0.35
0.21 - 0.35
0.22 - 0.29
Risk free interest rate
0.05% - 0.13%
0.13% - 2.06%
2.06% - 2.49%
Expected dividend yield
0.92% - 1.27%
0.92% - 1.39%
1.27% - 1.39%
Expected life (in years)0.50.50.5
Schedule of Nonvested Stock Unit Activity
The following table summarizes the Company's non-vested stock unit activity for the year ended December 31, 2021:
Number of
Shares
Weighted-
Average
Fair Value
at Grant Date
Non-vested stock units at December 31, 20205,185,045 $116.86 
Granted3,313,313 127.65 
Vested(2,674,194)109.46 
Forfeited(929,454)126.54 
Non-vested stock units at December 31, 20214,894,710 $126.25 
Schedule of Stock Options Activity The following table summarizes stock option activity in connection with the acquisition of Wrike during the year ended December 31, 2021:
Number of
Options		Weighted-
Average
Exercise Price		Weighted Average Remaining Contractual Life
(in years)
Aggregate
Intrinsic Value
(in thousands)(1)
Outstanding as of December 31, 2020— $— — 
Assumed from acquisitions526,113 48.32 
Exercised(23,998)43.04 
Forfeited or expired(19,443)49.26 
Outstanding as of December 31, 2021482,672 48.54 0.80$22,225 
Vested or expected to vest167,268 42.51 0.28$8,711 
Exercisable as of December 31, 2021167,268 $42.51 0.28$8,711 

(1) The intrinsic value is calculated as the difference between the exercise price of the underlying stock option award and the closing market price of the         Company’s common stock as of December 31, 2021.
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
The following table summarizes the assumptions used in the Black-Scholes option-pricing model to determine the estimated fair value of the assumed stock options:
Year Ended December 31,
2021
Expected volatility factor
0.51 - 0.75
Risk free interest rate
0.04% - 0.14%
Expected dividend yield
1.11%
Expected life (in years)
0.08 - 1.00
Schedule of Total Stock-Based Compensation Recognized By Income Statement Classification The detail of the total stock-based compensation recognized by income statement classification is as follows (in thousands):
Year Ended December 31,
Income Statement Classifications202120202019
Cost of subscription, support and services$18,493 $13,253 $10,921 
Research and development115,187 108,032 104,553 
Sales, marketing and services106,402 102,765 95,535 
General and administrative106,669 83,660 67,883 
Total$346,751 $307,710 $278,892