Consolidated Statements of Partners' Capital (USD $) In Thousands, unless otherwise specified	Total	Net Parent Equity [Member]	General Partner [Member]	Common Unitholders [Member]	Subordinated Unitholder [Member]	Accumulated Other Comprehensive Income [Member]
Beginning balance at Dec. 31, 2008	$ 56,792	$ 56,792
Partners' capital rollforward
Net income	6,539	6,539
Foreign currency translation adjustment	417	417
Net distributions to parent	(29,848)	(29,848)
Initial public offering proceeds, net of underwriters' discount	0
Payment of offering costs	0
Ending balance at Dec. 31, 2009	33,900	33,900
Partners' capital rollforward
Net income	1,617	1,617
Foreign currency translation adjustment	(42)	(42)
Net distributions to parent	(9,522)	(9,522)
Initial public offering proceeds, net of underwriters' discount	0
Payment of offering costs	0
Ending balance at Dec. 31, 2010	25,953	25,953
Partners' capital rollforward
Net income	7,257
Net income attributable to period from January 1, 2011 through June 19, 2011	296	296
Foreign currency translation adjustment	407
Net contributions from parent to predecessor	119,053	119,053
Contribution of net assets from predecessor	0	(146,183)	3,514	69,328	72,171	1,170
Foreign currency translation adjustment attributable to period from January 1, 2011 through June 19, 2011	675	675
Initial public offering proceeds, net of underwriters' discount	50,234			50,234
Payment of offering costs	(8,057)			(8,057)
Net income attributable to period from June 20, 2011 through December 31, 2011	6,961		139	4,026	2,796
Distributions ($0.3875 per unit)	(6,892)		(138)	(4,025)	(2,729)
Equity compensation	689	206		483
Other comprehensive income (loss), net of tax	(268)					(268)
Ending balance at Dec. 31, 2011	$ 188,644	$ 0	$ 3,515	$ 111,989	$ 72,238	$ 902