Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - EPS and New Accounting Principle (Details)

v3.4.0.3
Summary of Significant Accounting Policies - EPS and New Accounting Principle (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Earnings per share      
Weighted Average Number of Shares Outstanding, Basic 277,050,344 265,294,794  
Weighted Average Number of Shares Outstanding, Diluted 277,050,344 265,300,080  
New Accounting Pronouncement or Change in Accounting Principle, Retrospective Adjustments [Abstract]      
Other Assets, Noncurrent $ 34,337   $ 26,565
Long-term debt Noncurrent 4,702,809   4,668,782
Changes in accrued liabilities 47,785 $ 72,634  
Payments Related to Tax Withholding for Share-based Compensation $ (117) (46)  
As Previously Reported      
New Accounting Pronouncement or Change in Accounting Principle, Retrospective Adjustments [Abstract]      
Other Assets, Noncurrent     66,296
Long-term debt Noncurrent     4,708,513
Changes in accrued liabilities   72,588  
Adjustment Effect      
New Accounting Pronouncement or Change in Accounting Principle, Retrospective Adjustments [Abstract]      
Other Assets, Noncurrent     (39,731)
Long-term debt Noncurrent     $ (39,731)
Changes in accrued liabilities   46  
Payments Related to Tax Withholding for Share-based Compensation   $ (46)  
Restricted Stock and Restricted Stock Unit      
Earnings per share      
Dilutive effect of equity awards   5,286  
Weighted Average Anti-dilutive Awards 6,740,602 1,970,774  
Stock options      
Earnings per share      
Weighted Average Anti-dilutive Awards 720,206 81,021  
Performance share unit awards      
Earnings per share      
Weighted Average Anti-dilutive Awards 214,286