NONCONTROLLING INTERESTS (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Activity in noncontrolling interests [Roll Forward]
Noncontrolling interests, beginning of year				$ 20,598					$ 20,598
Net income attributable to noncontrolling interests	$ (1,188)	$ 210	$ 1,365	1,657	$ 27	$ 657	$ 84	$ (40)	2,044	$ 729	$ 20
Contribution from non-controlling interests									4,924	19,694	0
Distributions									(5,202)
Noncontrolling interests, end of year	22,356				20,598				22,356	20,598
Noncontrolling Interests [Member]
Activity in noncontrolling interests [Roll Forward]
Distributions									(5,202)
Noncontrolling Interests [Member] | Other [Member]
Activity in noncontrolling interests [Roll Forward]
Noncontrolling interests, beginning of year				$ 20,598				$ 238	20,598	238	199
Net income attributable to noncontrolling interests									2,044	729	20
Deconsolidation of LEAF									0	0	24
Distributions									(5,202)	(63)	(85)
Other									(8)	0	80
Noncontrolling interests, end of year	$ 22,356				$ 20,598				$ 22,356	$ 20,598	$ 238