Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 11,282	$ 10,817
Accounts receivable—trade, net	270,925	237,989
Inventories	87,050	101,124
Other	34,777	26,174
Total current assets	404,034	376,104
FIXED ASSETS, at cost	723,225	541,138
Less: Accumulated depreciation	(157,944)	(124,213)
Net fixed assets	565,281	416,925
NET INVESTMENT IN DIRECT FINANCING LEASES, net of unearned income	157,385	162,460
EQUITY INVESTEES	549,235	326,947
INTANGIBLE ASSETS, net of amortization	75,065	93,356
GOODWILL	325,046	325,046
OTHER ASSETS, net of amortization	33,618	30,006
TOTAL ASSETS	2,109,664	1,730,844
CURRENT LIABILITIES:
Accounts payable—trade	258,053	199,357
Accrued liabilities	54,598	50,071
Total current liabilities	312,651	249,428
SENIOR SECURED CREDIT FACILITY	500,000	409,300
SENIOR UNSECURED NOTES	350,895	250,000
DEFERRED TAX LIABILITIES	13,810	12,549
OTHER LONG-TERM LIABILITIES	15,813	16,929
PARTNERS’ CAPITAL:
Common unitholders, 81,202,752 and 71,965,062 units issued and outstanding at December 31, 2012 and 2011, respectively	916,495	792,638
TOTAL LIABILITIES AND PARTNERS’ CAPITAL	$ 2,109,664	$ 1,730,844