Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Shares of Common Stock Issued Under Employee Stock Purchase Plan (Details)

v3.20.4
Stockholders' Equity - Shares of Common Stock Issued Under Employee Stock Purchase Plan (Details) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Number of shares available, beginning balance (in shares)     171,069
Shares issued during period (in shares) 14,313 19,895 18,725
Number of shares available, ending balance (in shares) 118,136    
Weighted average per share price of shares issued (in dollars per share) $ 152.10 $ 103.84 $ 71.12