Quarterly report pursuant to Section 13 or 15(d)

Borrowings (6.125% Senior Notes) (Narrative) (Details)

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Borrowings (6.125% Senior Notes) (Narrative) (Details) - USD ($)
3 Months Ended
May 19, 2017
Oct. 03, 2016
Mar. 31, 2018
Callon Petroleum Operating Company      
Debt Instrument, Redemption [Line Items]      
Percentage of ownership in wholly-owned subsidiary (as a percent)     100.00%
6.125% senior unsecured notes due 2024      
Debt Instrument, Redemption [Line Items]      
Debt instrument aggregate principal amount $ 200,000,000 $ 400,000,000  
Debt instrument, interest rate, stated (as a percent) 6.125% 6.125% 6.125%
Debt instrument maturity date     Oct. 01, 2024
Debt instrument repayment beginning date     Apr. 01, 2017
Net proceeds from issuance of senior unsecured notes   $ 391,270,000  
Debt instrument redemption price percent (as a percent) 104.125%    
Proceeds from issuance of debt $ 206,139,000    
6.125% senior unsecured notes due 2024 | Change Of Control      
Debt Instrument, Redemption [Line Items]      
Debt instrument redemption price percent (as a percent)   101.00%  
6.125% senior unsecured notes due 2024 | Prior to October 1, 2019, a Redemption of up to 35% of the Principal      
Debt Instrument, Redemption [Line Items]      
Debt instrument redemption price percent (as a percent)   106.125%  
Number of days to closing date of equity offerings   180 days  
6.125% senior unsecured notes due 2024 | Prior to October 1, 2019, a Redemption of All or Part of the Principal      
Debt Instrument, Redemption [Line Items]      
Debt instrument redemption price percent (as a percent)   100.00%  
6.125% senior unsecured notes due 2024 | On or After October 1, 2019, but Before October 1, 2020      
Debt Instrument, Redemption [Line Items]      
Debt instrument redemption price percent (as a percent)   104.594%  
6.125% senior unsecured notes due 2024 | On or After October 1, 2020, but Before October 1, 2021      
Debt Instrument, Redemption [Line Items]      
Debt instrument redemption price percent (as a percent)   103.063%  
6.125% senior unsecured notes due 2024 | On or After October 1, 2021, but Before October 1, 2022      
Debt Instrument, Redemption [Line Items]      
Debt instrument redemption price percent (as a percent)   101.531%  
6.125% senior unsecured notes due 2024 | On or After October 1, 2022      
Debt Instrument, Redemption [Line Items]      
Debt instrument redemption price percent (as a percent)   100.00%  
6.125% senior unsecured notes due 2024 | Maximum | Prior to October 1, 2019, a Redemption of up to 35% of the Principal      
Debt Instrument, Redemption [Line Items]      
Redemption principal amount percentage (as a percent)   35.00%  
6.125% senior unsecured notes due 2024 | Minimum | Prior to October 1, 2019, a Redemption of up to 35% of the Principal      
Debt Instrument, Redemption [Line Items]      
Redemption principal remaining amount percentage (as a percent)   65.00%