Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 31,238	$ 33,384
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,475	8,606
Reserve for doubtful accounts	88	0
Amortization of loan fees	579	259
Unit-based compensation expense	920	581
Loss (gain) on disposal of assets, net	(244)	18
Changes in operating assets and liabilities:
Accounts receivable - Third-party	(15,136)	(424)
Accounts receivable - Affiliate	(7,533)	(1,045)
Inventories	(1,688)	(593)
Prepaid expenses	280	(1,374)
Other assets	(796)	20
Accounts payable and accrued liabilities	30,998	2,612
Other long-term liabilities	0	5
Net cash provided by operating activities	48,181	42,049
Cash flows from investing activities:
Capital expenditures	(16,412)	(12,087)
Distribution to Predecessor affiliate		(10,072)
Proceeds from sale of assets	290	57
Net cash used in investing activities	(16,122)	(22,102)
Cash flows from financing activities:
Additions to long-term debt	300,000	0
Payments on revolving credit facility	(269,000)	0
Deferred financing costs	(6,820)	0
Quarterly distributions to Western	(21,215)	(16,043)
Quarterly distributions to non-controlling interest holders	(10,772)	(8,510)
Net cash used in financing activities	(7,807)	(24,553)
Net change in cash and cash equivalents	24,252	(4,606)
Cash and cash equivalents at beginning of period	54,298	84,004
Cash and cash equivalents at end of period	78,550	79,398
Supplemental disclosure of cash flow information:
Interest paid	957	453
Income taxes paid	581	0
Supplemental disclosure of non-cash investing activities:
Accrued capital expenditures	$ 3,155	$ 260