XML 17 R46.htm IDEA: XBRL DOCUMENT v3.2.0.727
COMPENSATION PLANS (Details 2) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Feb. 23, 2014
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
AHGP LTIP          
Compensation Plans          
Units reserved for issuance   5,215,000   5,215,000  
SERP and Deferred Compensation Plans          
Compensation Plans          
Share based compensation expense   $ 0.3 $ 0.4 $ 0.7 $ 0.7
SERP and Deferred Compensation Plans | Phantom Share Units (PSUs)          
Compensation Plans          
Units outstanding   401,288   401,288  
Total intrinsic value   $ 10.3   $ 10.3  
SERP And MGP Deferred Compensation Plan          
Compensation Plans          
Total unit based obligation recorded   13.0   $ 13.0  
SERP And MGP Deferred Compensation Plan | Phantom Share Units (PSUs)          
Compensation Plans          
Units granted       14,020 10,806
Fair value (in dollars per unit)       $ 34.58 $ 42.93
AGP Deferred Compensation Plan          
Compensation Plans          
Total unit based obligation recorded   $ 1.0   $ 1.0  
Common units issued 3,167        
AGP Deferred Compensation Plan | Phantom Share Units (PSUs)          
Compensation Plans          
Units granted       2,078 2,560
Fair value (in dollars per unit)       $ 54.38 $ 60.56