STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Share Based Compensation Expense

The table below sets forth the total amount of stock-based compensation expense for the three months ended March 31, 2014 and 2013.

	Three Months Ended March 31,
	2014		2013
	(Thousands of dollars)
Stock-based compensation expense
Time-based restricted stock units	$	127	$	109
Performance-based restricted stock units		561		291
Total stock-based compensation expense	$	688	$	400