Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Details)

v2.4.0.8
Long-Term Debt (Details) (USD $)
3 Months Ended 3 Months Ended 0 Months Ended 0 Months Ended 3 Months Ended 0 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2014
Bank credit facility
Dec. 31, 2013
Bank credit facility
May 02, 2014
Bank credit facility
Subsequent event
Mar. 31, 2014
Bank credit facility
Minimum
Mar. 31, 2014
Bank credit facility
Maximum
Nov. 25, 2013
7.25% senior notes due 2019
Mar. 31, 2014
7.25% senior notes due 2019
Dec. 31, 2013
7.25% senior notes due 2019
Apr. 23, 2014
7.25% senior notes due 2019
Subsequent event
May 06, 2014
7.25% senior notes due 2019
Subsequent event
Mar. 31, 2014
7.25% senior notes due 2019
Antero Finance
Mar. 31, 2014
7.25% senior notes due 2019
Antero Finance
On or after August 1, 2014
Mar. 31, 2014
7.25% senior notes due 2019
Antero Finance
On or after August 1, 2017
Mar. 31, 2014
7.25% senior notes due 2019
Antero Finance
On or before August 1, 2014
Mar. 31, 2014
6.00% senior notes due 2020
Dec. 31, 2013
6.00% senior notes due 2020
Feb. 04, 2013
6.00% senior notes due 2020
Antero Finance
Nov. 19, 2012
6.00% senior notes due 2020
Antero Finance
Mar. 31, 2014
6.00% senior notes due 2020
Antero Finance
On or after December 1, 2015
Mar. 31, 2014
6.00% senior notes due 2020
Antero Finance
On or after December 1, 2018
Mar. 31, 2014
6.00% senior notes due 2020
Antero Finance
On or before December 1, 2015
Mar. 31, 2014
6.00% senior notes due 2020
Antero Finance
Prior to December 1, 2015
Mar. 31, 2014
6.00% senior notes due 2020
Maximum
Antero Finance
On or before December 1, 2015
Mar. 31, 2014
5.375% senior notes due 2021
Dec. 31, 2013
5.375% senior notes due 2021
Nov. 05, 2013
5.375% senior notes due 2021
Mar. 31, 2014
5.375% senior notes due 2021
On or after November 1, 2016
Mar. 31, 2014
5.375% senior notes due 2021
On or after November 1, 2019
Mar. 31, 2014
5.375% senior notes due 2021
Prior to November 1, 2016
Mar. 31, 2014
5.375% senior notes due 2021
On or before November 1, 2016
Mar. 31, 2014
5.375% senior notes due 2021
Minimum
On or before November 1, 2016
Mar. 31, 2014
Net unamortized premium
Dec. 31, 2013
Net unamortized premium
Mar. 31, 2014
Stand-alone revolving note
Dec. 31, 2013
Stand-alone revolving note
Nov. 25, 2013
5.125% senior subordinated notes due 2022
Long- term Debt                                                                            
Long-term debt $ 2,535,819,000 $ 2,078,999,000 $ 745,000,000 $ 288,000,000         $ 260,000,000 $ 260,000,000             $ 525,000,000 $ 525,000,000               $ 1,000,000,000 $ 1,000,000,000             $ 5,819,000 $ 5,999,000      
Interest rate (as a percent)                 7.25% 7.25%             6.00% 6.00%               5.375% 5.375% 5.375%                   5.125%
Maximum amount of the Credit Facility     2,500,000,000   3,500,000,000                                                             25,000,000    
Maximum amount of the Credit Facility before amendment         2,500,000,000                                                                  
Current borrowing base     2,000,000,000   3,000,000,000                                                                  
Current borrowing base before amendment         2,000,000,000                                                                  
Lender commitments     1,500,000,000   2,000,000,000                                                                  
Redemption of debts out of the proceeds from its IPO               140,000,000                                                            
Lender commitments before amendment         1,500,000,000                                                                  
Make-hole premium percentage                       106.072%                                                    
Outstanding balance     745,000,000 288,000,000                                                               0 0  
Weighted average interest rate (as a percent)     1.94% 1.61%                                                                    
Outstanding letters of credit     73,000,000 32,000,000                                                                    
Commitment fees on the unused portion (as a percent)           0.375% 0.50%                                                              
Senior notes issued                                     $ 225,000,000 $ 300,000,000               $ 1,000,000,000                    
Issue price as percentage of par value                                     103.00%                                      
Redemption price of the debt instrument in the event of change of control (as a percent)                           105.438% 100.00% 100.00%         104.50% 100.00% 100.00%           104.031% 100.00% 100.00%              
Percentage of the principal amount of the debt instrument redeemed                                                   110.00%                        
Percentage of the principal amount of the 2021 notes, plus accrued interest of the debt instrument redeemed                                                   101.00%           105.375%            
Percentage of the principal amount of the debt instrument which the entity may redeem with the proceeds from certain equity offerings                                                 35.00%               35.00%          
Redemption price of the debt instrument if redeemed with the proceeds of certain equity offerings (as a percent)                                             106.00%                              
Percentage of principal amount at which notes may be required to be repurchased in event of change of control                         101.00%                     101.00%                            
Description of variable rate basis     LIBOR or lender's prime rate                                                                 lender's prime rate    
Basis spread on variable rate (as a percent)                                                                       1.00%    
Percentage of the principal amount of the debt instrument which the entity may redeem with the proceeds from initial public offering               100.00%     100.00%