UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 9,579	$ 10,300
Accounts receivable - trade, net	297,847	323,462
Inventories	84,094	73,531
Other	44,877	35,986
Total current assets	436,397	443,279
FIXED ASSETS, at cost	5,505,360	5,440,858
Less: Accumulated depreciation	(1,160,353)	(1,023,825)
Net fixed assets	4,345,007	4,417,033
MINERAL LEASEHOLDS, net of accumulated depletion	558,197	560,481
NET INVESTMENT IN DIRECT FINANCING LEASES, net of unearned income	112,428	116,925
EQUITY INVESTEES	344,583	355,085
INTANGIBLE ASSETS, net of amortization	147,178	162,602
GOODWILL	301,959	301,959
RIGHT OF USE ASSETS, net	191,497	0
OTHER ASSETS, net of amortization	117,697	121,707
TOTAL ASSETS	6,554,943	6,479,071
CURRENT LIABILITIES:
Accounts payable - trade	132,026	127,327
Accrued liabilities	220,975	205,507
Total current liabilities	353,001	332,834
SENIOR SECURED CREDIT FACILITY	967,000	970,100
SENIOR UNSECURED NOTES, net of debt issuance costs	2,466,137	2,462,363
DEFERRED TAX LIABILITIES	12,911	12,576
OTHER LONG-TERM LIABILITIES	397,690	259,198
Total liabilities	4,196,739	4,037,071
MEZZANINE CAPITAL:
Class A Convertible Preferred Units, 25,336,778 and 24,438,022 issued and outstanding at June 30, 2019 and December 31, 2018, respectively	790,115	761,466
PARTNERS’ CAPITAL:
Common unitholders, 122,579,218 units issued and outstanding at June 30, 2019 and December 31, 2018	1,575,599	1,690,799
Accumulated other comprehensive income	939	939
Noncontrolling interests	(8,449)	(11,204)
Total partners' capital	1,568,089	1,680,534
TOTAL LIABILITIES, MEZZANINE CAPITAL AND PARTNERS’ CAPITAL	$ 6,554,943	$ 6,479,071