Supplemental Guarantor Financial Information Supplemental Guarantor Financial Information (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Cash Flow Statements, Captions [Line Items]
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)
Intercompany investment activities	0	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)
Payment of financing costs	0	22,486	916
Intercompany contribution (distribution)	0	0	0
Intercompany loan activity	0	0	$ 0
Contribution from general partner	0	8,405
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
Issuers [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	0	14,688	0
Investing activities:
Purchases of property, plant, and equipment, net	0	0	0
Acquisition of CSI	0	0
Intercompany investment activities	68,360	(367,512)	26,969
Advances and other investing activities		0	0
Net cash used in investing activities	68,360	(367,512)	26,969
Financing activities:
Proceeds from long-term debt, net	0	344,961	0
Payments of long-term debt	0	0
Proceeds from issuance of partnership common units, net of underwriters' discount	0	395,794
Distributions	68,360	36,687	26,969
Payment of financing costs	0	9,649	0
Intercompany contribution (distribution)	0	0	0
Intercompany loan activity	0	(350,000)	0
Contribution from general partner	0	8,405
Net cash (used in) provided by financing activities	(68,360)	352,824	(26,969)
Effect of exchange rate changes on cash	0	0	0
Increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	0	0	0
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	84,351	22,767	21,733
Investing activities:
Purchases of property, plant, and equipment, net	(76,553)	(44,313)	$ (19,263)
Acquisition of CSI	0	(825,000)
Intercompany investment activities	0	(2,633)
Advances and other investing activities	(69)	805	$ 0
Net cash used in investing activities	(76,622)	(872,751)	(19,263)
Financing activities:
Proceeds from long-term debt, net	63,000	257,897	19,909
Payments of long-term debt	(23,000)	93,584
Proceeds from issuance of partnership common units, net of underwriters' discount	0	0
Distributions	0	0	0
Payment of financing costs	0	12,837	916
Intercompany contribution (distribution)	(68,360)	367,512	(26,969)
Intercompany loan activity	0	350,000	291
Contribution from general partner	0	0
Net cash (used in) provided by financing activities	(28,360)	868,988	(7,685)
Effect of exchange rate changes on cash	0	0	0
Increase (decrease) in cash and cash equivalents	(20,631)	19,004	(5,215)
Cash and cash equivalents at beginning of period	23,343	4,339	9,554
Cash and cash equivalents at end of period	2,712	23,343	4,339
Other Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	17,542	7,364	7,402
Investing activities:
Purchases of property, plant, and equipment, net	(18,719)	(3,824)	$ (5,311)
Acquisition of CSI	0	0
Intercompany investment activities
Advances and other investing activities	0	0	$ 0
Net cash used in investing activities	(18,719)	(3,824)	(5,311)
Financing activities:
Proceeds from long-term debt, net	0	0	0
Payments of long-term debt	0	0
Proceeds from issuance of partnership common units, net of underwriters' discount	0	0
Distributions	0	0	$ 0
Payment of financing costs	0
Intercompany contribution (distribution)	0	2,633	$ 0
Intercompany loan activity	0	0	(291)
Contribution from general partner	0	0
Net cash (used in) provided by financing activities	0	2,633	(291)
Effect of exchange rate changes on cash	(1,638)	(588)	(74)
Increase (decrease) in cash and cash equivalents	(2,815)	5,585	1,726
Cash and cash equivalents at beginning of period	10,723	5,138	3,412
Cash and cash equivalents at end of period	7,908	10,723	5,138
Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	0	0	0
Investing activities:
Purchases of property, plant, and equipment, net	0	0	0
Acquisition of CSI	0	0
Intercompany investment activities	(68,360)	$ 370,145	(26,969)
Advances and other investing activities			0
Net cash used in investing activities	(68,360)	$ 370,145	(26,969)
Financing activities:
Proceeds from long-term debt, net	0	0	0
Payments of long-term debt	0	0
Proceeds from issuance of partnership common units, net of underwriters' discount	0	0
Distributions	0	0	0
Payment of financing costs	0	0	0
Intercompany contribution (distribution)	68,360	(370,145)	26,969
Intercompany loan activity	0	0	0
Contribution from general partner	0	0
Net cash (used in) provided by financing activities	68,360	(370,145)	26,969
Effect of exchange rate changes on cash	0	0	0
Increase (decrease) in cash and cash equivalents	0	0	0
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	$ 0	$ 0	$ 0