Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events - Capital Return Program (Details)

v3.7.0.1
Subsequent Events - Capital Return Program (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 1 Months Ended 3 Months Ended 6 Months Ended
Jul. 11, 2017
Apr. 25, 2017
Jul. 25, 2017
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Subsequent Event [Line Items]              
Common stock repurchased, value           $ 775,701  
Dividends declared per common share (in dollars per share)   $ 0.01   $ 0.01 $ 0 $ 0.02 $ 0
Open Market              
Subsequent Event [Line Items]              
Common stock repurchased (in shares)           155,711 261,451
Common stock repurchased, value           $ 775,701 $ 991,363
Subsequent Event              
Subsequent Event [Line Items]              
Dividends declared per common share (in dollars per share) $ 0.01            
Subsequent Event | Open Market              
Subsequent Event [Line Items]              
Common stock repurchased (in shares)     13,314        
Common stock repurchased, value     $ 72,135