SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Supplementary Cash Flows Information

The following table presents certain supplementary cash flows information for the years ended December 31, 2015, 2014 and 2013:

	Year Ended December 31,
(In thousands)	2015		2014		2013
Supplementary cash flows information:
Interest paid (net of interest capitalized)	$	191,041	$	185,288	$	155,112
Income taxes paid — net	55,722		44,524		20,092
Supplementary non-cash investing and financing activities:
Additions to property, plant and equipment and other long-lived assets (a)	$	110,354	$	90,949	$	68,276
Allowance for equity funds used during construction	28,075		20,825		30,159

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(a) Amounts consist of current liabilities for construction labor and materials that have not been included in investing activities. These amounts have not been paid for as of December 31, 2015, 2014 or 2013, respectively, but have been or will be included as a cash outflow from investing activities for expenditures for property, plant and equipment when paid.