Unaudited Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 3,486	$ 269
Accounts receivable	27,274	32,248
Due from affiliates	38,658	49,613
Financing receivables - affiliate	3,459	3,392
Inventories, net	63,625	56,524
Prepaid royalties - affiliate	1,619	2,000
Deferred longwall costs	26,401	14,940
Other prepaid expenses and current assets	8,603	10,872
Contract-based intangibles	1,031	1,326
Total current assets	174,156	171,184
Property, plant, equipment and development, net	2,134,244	2,148,569
Financing receivables - affiliate	59,815	60,705
Prepaid royalties, net	3,054	2,678
Other assets	12,431	4,311
Contract-based intangibles	545	726
Total assets	2,384,245	2,388,173
Current liabilities:
Current portion of long-term debt and finance lease obligations	43,000	53,709
Current portion of sale-leaseback financing arrangements	6,807	6,629
Accrued interest	31,684	24,304
Accounts payable	116,797	99,735
Accrued expenses and other current liabilities	66,235	67,466
Asset retirement obligations	6,578	6,578
Due to affiliates	16,304	17,740
Contract-based intangibles	8,211	8,820
Total current liabilities	295,616	284,981
Long-term debt and finance lease obligations	1,203,094	1,194,394
Sale-leaseback financing arrangements	187,976	189,855
Asset retirement obligations	39,578	38,966
Other long-term liabilities	17,454	16,428
Contract-based intangibles	65,281	66,834
Total liabilities	1,808,999	1,791,458
Limited partners' capital:
Total partners' capital	575,246	596,715
Total liabilities and partners' capital	2,384,245	2,388,173
Common Units
Limited partners' capital:
Total partners' capital	366,064	377,880
Subordinated Units
Limited partners' capital:
Total partners' capital	$ 209,182	$ 218,835