INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2013

Finite-Lived Intangible Assets, Net [Abstract]

Schedule of Finite-Lived Intangible Assets by Major Class [Table Text Block]

Intangible assets consisted of the following:



	December 31, 2013								December 31, 2012
	Cost				Accumulated Amortization				Cost				Accumulated Amortization
	(Thousands of Dollars)
Customer relationships	$	127,614			$	(58,230	)		$	137,470			$	(46,951	)
Other	2,359				(494		)		2,359				(443		)
Total	$	129,973			$	(58,724	)		$	139,829			$	(47,394	)

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]

The estimated aggregate amortization expense for the next five years is as follows:



	Amortization Expense
	(Thousands of Dollars)
2014	$	12,579
2015	$	9,709
2016	$	6,840
2017	$	6,840
2018	$	6,840