DERIVATIVE INSTRUMENTS

3 Months Ended

Mar. 31, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

DERIVATIVE INSTRUMENTS

The fair value of outstanding derivative instruments not designated as hedging instruments on the accompanying unaudited Consolidated Balance Sheets was as follows (in thousands):

Derivative Instruments	Balance Sheet Location	March 31, 2016		December 31, 2015
Contracts to purchase power	Other current liabilities	$	15,934	$	13,679
Contracts to purchase power	Other liabilities	23,834		23,656

The effect of derivative instruments not designated as hedging instruments on the accompanying unaudited Consolidated Statements of Operations was as follows (in thousands):

		Three Months Ended March 31,
Derivative Instruments	Statement of Operations Location	2016			2015
Contracts to purchase power	Derivative gain (loss)	$	(2,600	)	$	5,276