Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income	$ 47,731	$ 49,634
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	14,458	12,898
Reserve for doubtful accounts	16	0
Amortization of loan fees	925	391
Unit-based compensation expense	1,476	1,121
Gain on disposal of assets, net	(257)	(16)
Changes in operating assets and liabilities:
Accounts receivable - Third-party	(6,582)	(346)
Accounts receivable - Affiliate	9,886	(179)
Inventories	(2,961)	(1,589)
Prepaid expenses	(578)	32
Other assets	(2,210)	(765)
Accounts payable and accrued liabilities	3,963	3,816
Other long-term liabilities	0	(5)
Net cash provided by operating activities	65,867	64,992
Cash flows from investing activities:
Capital expenditures	(24,021)	(17,335)
Distribution to Predecessor affiliate		(13,986)
Proceeds from sale of assets	453	20
Net cash used in investing activities	(23,568)	(31,301)
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	(32,845)	(25,210)
Quarterly distributions to non-controlling interest holders	(16,560)	(13,373)
Net cash used in financing activities	(25,225)	(38,583)
Net change in cash and cash equivalents	17,074	(4,892)
Cash and cash equivalents at beginning of period	54,298	84,004
Cash and cash equivalents at end of period	71,372	79,112
Supplemental disclosure of cash flow information:
Interest paid	12,690	683
Income taxes paid	737	1
Supplemental disclosure of non-cash investing activities:
Accrued capital expenditures	$ 810	$ 457