SUPPLEMENTAL CASH FLOW INFORMATION (Details) (USD $) In Thousands, except Share data in Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2013
Cash paid for interest (net of capitalized interest)	$ 52,703	$ 48,987
Cash paid for income taxes	127	172
Capitalized interest	2,042	1,527
Non-cash investing activities:
Decrease in accounts payable and accrued and other current liabilities related to capital expenditures	(20,741)	(5,621)
Non-cash financing activities:
LP Unit conversion ratio			1
Class B Units
Non-cash financing activities:
Issuance of Class B Units in lieu of quarterly cash distribution		$ 8,274
Public offering, LP units issued	0