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Stockholders' Deficit - Repurchase of Common Stock (Details) - USD ($)
3 Months Ended
Jun. 13, 2014
Mar. 31, 2019
May 02, 2018
Equity, Class of Treasury Stock [Line Items]      
Number of shares repurchased (in shares) 3,932,244 406,586  
Value of shares repurchased   $ 17,700,000  
Shares acquired, average price per share (in usd per share) $ 33.06    
July 2015 Repurchase Program      
Equity, Class of Treasury Stock [Line Items]      
Value of shares repurchased   $ 17,700,000  
Shares acquired, average price per share (in usd per share)   $ 43.41  
Common Stock | July 2015 Repurchase Program      
Equity, Class of Treasury Stock [Line Items]      
Stock repurchase program, authorized increase     $ 1,000,000,000.0