Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Schedule of Repurchase Agreements (Details)

v3.10.0.1
Stockholders' Equity - Schedule of Repurchase Agreements (Details) - USD ($)
shares in Thousands, $ in Thousands
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Shares Repurchase Activity [Line Items]      
Amount $ 317,061    
Treasury stock value $ 0   $ 17,154
Open Market      
Shares Repurchase Activity [Line Items]      
Shares (in shares) 55,843 155,711  
Amount $ 317,061 $ 775,701