EARNINGS PER COMMON UNIT (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Share [Abstract]

Schedule of computation of basic and diluted earnings per unit

Basic and diluted earnings per unit are computed as follows:

	Year ended December 31,
	2015			2014		2013
	($ in thousands except per unit data)
Net income (loss)	$	(9,411	)	$	89,079	$	22,046
Basic earnings per unit:
Weighted average common units outstanding	23,973,850			23,527,469		23,219,680
Weighted average phantom units deemed participating securities	—			542,949		795,882
Total	23,973,850			24,070,418		24,015,562
Earnings (loss) per common unit (basic)	$	(0.39	)	$	3.70	$	0.92
Diluted earnings per unit:
Weighted average common units outstanding	23,973,850			23,527,469		23,219,680
Weighted average phantom units deemed participating securities	—			542,949		795,882
Weighted average potentially dilutive units outstanding	—			6,019		6,395
Total	23,973,850			24,076,437		24,021,957
Earnings (loss) per common unit (diluted)	$	(0.39	)	$	3.70	$	0.92