Quarterly report pursuant to Section 13 or 15(d)

Acquisitions and Divestitures - Business Acquisition Pro Forma Information Incremental Items (Parenthetical) (Details)

v3.3.0.814
Acquisitions and Divestitures - Business Acquisition Pro Forma Information Incremental Items (Parenthetical) (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Business Acquisition [Line Items]      
Long-term debt, less current maturities $ 1,473,348   $ 1,360,057
Federal statutory income tax rate 35.00%    
Woodside Properties      
Business Acquisition [Line Items]      
Long-term debt, less current maturities   $ 55,000  
Federal statutory income tax rate   35.00%  
Woodside Properties | Revolving Credit Facility      
Business Acquisition [Line Items]      
Effective interest rate   1.80%