Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity Share Repurchase Program (Details)

v3.6.0.2
Stockholders' Equity Share Repurchase Program (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Class of Stock [Line Items]    
Stock Repurchase Program, Number of Shares Authorized to be Repurchased 75,000,000 25,000,000
Stock Repurchase Program, Number of Additional Shares Authorized to be Repurchased 50,000,000  
Stock Repurchase Program, Number of Shares Repurchased and Retired to Date 24,135,000  
Stock Repurchase Program, Value of Shares Repurchased and Retired to Date $ 200,375  
Stock Repurchased and Retired During Period, Shares 8,020,000 13,664,300
Stock Repurchased and Retired During Period, Value $ 61,307 $ 115,174
Common Stock [Member]    
Class of Stock [Line Items]    
Stock Repurchased and Retired During Period, Shares 8,020,000 13,664,300
Stock Repurchased and Retired During Period, Value $ 80 $ 137