XML 64 R47.htm IDEA: XBRL DOCUMENT v3.5.0.2
DERIVATIVE INSTRUMENTS - BROKER MARGIN DEPOSITS (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Sep. 30, 2015
Derivative [Line Items]    
Broker margin - Current assets $ 57,606 $ 12,990
Broker margin - Current (liabilities) 0 (4,103)
NJNG [Member]    
Derivative [Line Items]    
Broker margin - Current assets 6,701 12,990
NJRES [Member]    
Derivative [Line Items]    
Broker margin - Current assets 50,905 0
Broker margin - Current (liabilities) $ 0 $ (4,103)