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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Cash and cash equivalents | $ 546,675 | $ 339,629
Current assets | 1,312,025 | 942,927
Total assets | 6,497,082 | 6,515,628
Current liabilities | 1,311,361 | 1,070,804
Liabilities | $ 3,915,311 | $ 3,699,182
Preferred Stock, Par or Stated Value Per Share | $ 0.001 | $ 0.001
Preferred Stock, Shares Authorized | 49,889,000 | 49,889,000
Preferred Stock, Shares Issued | 0 |
Preferred Stock, Shares Outstanding | 0 | 0
Treasury Stock, Shares | 17,627,000 | 16,008,000
Class A Common Stock |  |
Common Stock, Par or Stated Value Per Share | $ 0.004 | $ 0.004
Common Stock, Shares Authorized | 700,000,000 | 700,000,000
Common Stock, Shares, Issued | 136,702,000 | 135,583,000
Common Stock, Shares, Outstanding | 119,075,000 | 119,575,000
Class B Common Stock |  |
Common Stock, Par or Stated Value Per Share | $ 0.004 | $ 0.004
Common Stock, Shares Authorized | 175,000,000 | 175,000,000
Common Stock, Shares, Issued | 90,813,000 | 90,831,000
Common Stock, Shares, Outstanding | 90,813,000 | 90,831,000

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