Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income	$ 14,007	$ 13,411
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	7,144	5,892
Reserve for doubtful accounts	1	27
Amortization of loan fees	342	235
Unit-based compensation expense	524	415
Gain on disposal of assets, net	(99)	(84)
Changes in operating assets and liabilities:
Accounts receivable - Third-party	(5,893)	(8,066)
Accounts receivable - Affiliate	4,909	(3,558)
Inventories	2,724	(551)
Prepaid expenses	(1,247)	1,405
Other assets	63	(2,181)
Accounts payable and accrued liabilities	2,315	25,787
Net cash provided by operating activities	24,790	32,732
Cash flows from investing activities:
Capital expenditures	(6,241)	(26,644)
Proceeds from sale of assets	119	117
Net cash used in investing activities	(6,122)	(26,527)
Cash flows from financing activities:
Additions to long-term debt	0	300,000
Payments on revolving credit facility	(15,000)	(269,000)
Deferred financing costs	0	(6,551)
Quarterly distributions to Western	(13,392)	(10,314)
Quarterly distributions to non-controlling interest holders	(6,228)	(5,261)
Contributions from affiliate	0	18,795
Net cash provided by (used in) financing activities	(34,620)	27,669
Net change in cash and cash equivalents	(15,952)	33,874
Cash and cash equivalents at beginning of period	44,605	54,298
Cash and cash equivalents at end of period	28,653	88,172
Supplemental disclosure of cash flow information:
Interest paid	12,324	725
Income taxes paid	30	1
Supplemental disclosure of non-cash investing activities:
Accrued capital expenditures	$ 5,617	$ 2,387