Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Cash Flows (Parenthetical)

v3.19.3.a.u2
Consolidated Statements of Cash Flows (Parenthetical) - $ / shares
Dec. 31, 2019
Dec. 31, 2018
Class B Common Stock    
Common stock, par value $ 0.01 $ 0.01