Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 18,668	$ 11,282
Accounts receivable-trade, net	353,545	270,925
Inventories	87,908	87,050
Other	25,879	34,777
Total current assets	486,000	404,034
FIXED ASSETS, at cost	833,151	723,225
Less: Accumulated depreciation	(177,112)	(157,944)
Net fixed assets	656,039	565,281
NET INVESTMENT IN DIRECT FINANCING LEASES, net of unearned income	154,694	157,385
EQUITY INVESTEES	604,380	549,235
INTANGIBLE ASSETS, net of amortization	68,786	75,065
GOODWILL	325,046	325,046
OTHER ASSETS, net of amortization	38,107	33,618
TOTAL ASSETS	2,333,052	2,109,664
CURRENT LIABILITIES:
Accounts payable-trade	326,843	258,053
Accrued liabilities	69,460	54,598
Total current liabilities	396,303	312,651
SENIOR SECURED CREDIT FACILITY	319,100	500,000
SENIOR UNSECURED NOTES	700,835	350,895
DEFERRED TAX LIABILITIES	13,275	13,810
OTHER LONG-TERM LIABILITIES	17,091	15,813
COMMITMENTS AND CONTINGENCIES (Note 13)
PARTNERS' CAPITAL:
Common unitholders, 81,202,752 units issued and outstanding at March 31, 2013 and December 31, 2012	886,448	916,495
TOTAL LIABILITIES AND PARTNERS' CAPITAL	$ 2,333,052	$ 2,109,664