Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net income	$ 19,886	$ 5,757
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,732	9,338
Reserve for doubtful accounts	(15)	1
Amortization of loan fees	492	342
Unit-based compensation expense	635	524
Deferred income taxes	488	0
Gain on disposal of assets, net	(291)	(99)
Changes in operating assets and liabilities:
Accounts receivable - Third-party	2,870	(5,893)
Accounts receivable - Affiliate	2,570	4,909
Inventories	8	2,724
Prepaid expenses	(525)	(1,247)
Other assets	2,734	132
Accounts payable and accrued liabilities	4,762	2,525
Net cash provided by operating activities	43,346	19,013
Cash flows from investing activities:
Capital expenditures	(5,470)	(8,356)
Proceeds from sale of assets	363	119
Net cash used in investing activities	(5,107)	(8,237)
Cash flows from financing activities:
Payments on revolving credit facility	0	(15,000)
Deferred financing costs	(78)	0
Quarterly distributions to Western	(16,154)	(13,392)
Quarterly distributions to common unitholders - public	(12,629)	(6,228)
Payments of tax withholdings for unit-based compensation	732	483
Contributions from affiliate	0	8,375
Net cash used in financing activities	(29,593)	(26,728)
Net change in cash and cash equivalents	8,646	(15,952)
Cash and cash equivalents at beginning of period	14,652	44,605
Cash and cash equivalents at end of period	23,298	28,653
Supplemental disclosure of cash flow information:
Interest paid	11,761	12,324
Income taxes paid	89	30
Supplemental disclosure of non-cash investing and financing activities:
Accrued capital expenditures	5,280	5,826
Conversion of subordinated units	$ 367,766	$ 0