Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation - Schedule of Non-vested Share Activity (Details)

v3.6.0.2
Share-Based Compensation - Schedule of Non-vested Share Activity (Details) - Restricted Stock [Member] - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Non-vested at January 1, 2016, Shares 7,536    
Non-vested at January 1, 2016, Weighted Average Grant Date Fair Value Per Share $ 22.80    
Granted, Shares 273 19 550
Granted, Weighted Average Grant Date Fair Value $ 34.41 $ 70.43 $ 60.09
Vested, Shares (1,701)    
Vested, Weighted Average Grant Date Fair Value Per Share $ 21.37    
Forfeited, Shares (457)    
Forfeited, Weighted Average Grant Date Fair Value $ 23.00    
Non-vested at December 31, 2016, Shares 5,651 7,536  
Non-vested at December 31, 2016, Weighted Average Grant Date Fair Value Per Share $ 24.12 $ 22.80