XML 44 R26.htm IDEA: XBRL DOCUMENT v2.4.0.8
Share Based Compensation (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Dec. 31, 2013
Dec. 31, 2012
Valuation And Expense Information [Abstract]            
Total cost of share based payment plans $ (1,041) $ 4,355 $ 1,739 $ 8,858    
Amounts capitalized in oil and gas properties and equipment 435 1,302 710 2,796    
Stock compensation (1,476) 3,053 1,029 6,062    
Amount of related income tax benefit recognized in income before valuation allowance $ (617) $ 1,257 $ 430 $ 2,496    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]            
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit     $ 25.68   $ 16.97 $ 16.97
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit     $ 98.87   $ 98.87 $ 98.87
Forfeited     (1)   (110)  
Exercise Price, Lower Range Limit Forfeited     $ 63.05   $ 25.68  
Exercise Price, Upper Range Limit Forfeited     $ 63.05   $ 75.18  
Exercised     (39)   (1)  
Exercise Price, Lower Range Limit Exercised     $ 16.97   $ 16.97  
Exercise Price, Upper Range Limit Exercised     $ 16.97   $ 16.97  
Number Of Options [Member]
           
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]            
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Number of Outstanding Options 1,206   1,206   1,246 1,357