Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating activities:
Net income	$ (146,630)	$ 11,258	$ 17,567
Reconciliation of net income to cash provided by operating activities:
Depreciation and amortization	81,838	40,879	14,349
Impairment of long-lived assets	11,797	278	293
Impairment of goodwill	139,444	0	0
Provision (benefit) for deferred income taxes	(605)	(3,514)	(266)
Equity compensation expense	2,164	1,544	1,459
Provision for doubtful accounts	508	185	279
Amortization of deferred financing costs	2,786	1,163	0
Loss on sale of property, plant, and equipment	(196)	484	20
Other non-cash charges and (credits)	825	(238)	325
Financing expense	0	6,750	0
Changes in operating assets and liabilities:
Accounts receivable	19,732	(23,943)	(5,534)
Inventories	64,893	(30,972)	2,097
Prepaid expenses and other current assets	(2,753)	(8,031)	1,888
Accounts payable and accrued expenses	(71,592)	49,152	(3,342)
Other	(318)	(176)	0
Net cash provided by operating activities	101,893	44,819	29,135
Investing activities:
Purchases of property, plant, and equipment, net	(95,272)	(48,137)	(24,574)
Acquisition of CSI	0	(825,000)	0
Advances and other investing activities	(69)	(805)	0
Net cash used in investing activities	(95,341)	(873,942)	(24,574)
Financing activities:
Proceeds from long-term debt, net	63,000	602,858	19,909
Payments of long-term debt	(23,000)	(93,584)	0
Proceeds from issuance of partnership common units, net of underwriters' discount	0	395,794	0
Distributions	(68,360)	(36,687)	(26,969)
Financing costs	0	22,486	$ 916
Contribution from general partner	0	8,405
Deferred financing cost and other financing activities	0	(22,486)	$ (916)
Net cash (used in) provided by financing activities	(28,360)	854,300	(7,976)
Effect of exchange rate changes on cash	(1,638)	(588)	(74)
Increase (decrease) in cash and cash equivalents	(23,446)	24,589	(3,489)
Cash and cash equivalents at beginning of period	34,066	9,477	12,966
Cash and cash equivalents at end of period	10,620	34,066	9,477
Supplemental cash flow information:
Taxes paid	598	2,247	2,204
Interest paid	$ 32,994	$ 12,930	$ 497