Quarterly report pursuant to Section 13 or 15(d)

Share-Based Payments - Employee Stock Purchase Plan (Details)

v3.20.1
Share-Based Payments - Employee Stock Purchase Plan (Details)
shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
shares
Mar. 31, 2019
USD ($)
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]    
Share-based compensation expense | $ $ 3,266 $ 3,047
Employee Stock Purchase Plan [Member]    
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]    
Number of Shares Authorized (in shares) | shares 350  
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date 90.00%  
Number of Large Lump Sum Contributions Related to ESPP Stock Purchases 2