Comprehensive Income

9 Months Ended

Sep. 30, 2011

Comprehensive Income [Abstract]

COMPREHENSIVE INCOME

6. COMPREHENSIVE INCOME.

Comprehensive income is as follows:

		Three months ended				Nine months ended
		September 30,				September 30,
		2011		2010		2011		2010
		(Thousands of Dollars)
Net income		$	35,241	$	37,673	$	110,303	$	109,934
Amortization of cash flow hedges			(16)		(15)		(47)		(46)
	Total comprehensive income	$	35,225	$	37,658	$	110,256	$	109,888