DISCLOSURES ABOUT SEGMENTS OF AN ENTERPRISE AND RELATED INFORMATION (Details 2) (USD $) In Thousands, unless otherwise specified	1 Months Ended	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Income Before Income Taxes
Total operating profit		$ 12,165	$ 10,043
Depreciation and amortization expense		(3,132)	(3,476)
Gain on derivative instrument	1,000		990
Loss on debt repayment			(440)
Intercompany interest income		203	218
Interest expense, net of intercompany elimination		(9,777)	(11,218)
Income before income taxes		4,424	108
Reportable segments
Income Before Income Taxes
Total operating profit		17,721	14,883
Depreciation and amortization expense		(2,440)	(2,829)
Intercompany interest income		602	677
Interest expense, net of intercompany elimination		(586)	(605)
Unallocated amount
Income Before Income Taxes
G & A expense		(3,015)	(3,606)
Depreciation and amortization expense		(692)	(647)
Gain on derivative instrument			990
Loss on debt repayment			(440)
Interest expense, net of intercompany elimination		(9,191)	(10,613)
Elimination of intercompany
Income Before Income Taxes
Intercompany interest income		$ (399)	$ (459)