Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements of Operations [Abstract]
Revenue	$ 71,841	$ 53,790	$ 140,570	$ 106,500
Costs and expenses:
Cost of sales (excluding depreciation and amortization expense)	39,824	29,126	76,876	54,977
Depreciation and amortization	15,459	11,763	29,608	23,641
Long-lived asset impairment	305		305	231
Selling, general and administrative	9,927	8,519	20,143	16,214
Interest expense	7,553	5,724	14,628	11,416
Other (income) expense, net	455	(170)	234	(406)
Total costs and expenses	73,523	54,962	141,794	106,073
Income (loss) before income taxes	(1,682)	(1,172)	(1,224)	427
Income tax expense	256	173	491	346
Net income (loss)	(1,938)	(1,345)	(1,715)	81
General partner interest in net income (loss)	676	285	1,248	625
Common units interest in net income (loss)	(2,240)	(1,198)	(2,537)	(400)
Subordinated units interest in net income (loss)	$ (374)	$ (432)	$ (426)	$ (144)
Weighted average common units outstanding:
Basic	29,089	17,560	28,231	17,553
Diluted	29,089	17,560	28,231	17,553
Weighted average subordinated units outstanding:
Basic	4,744	6,325	4,744	6,325
Diluted	4,744	6,325	4,744	6,325
Loss per common unit:
Basic	$ (0.08)	$ (0.07)	$ (0.09)	$ (0.02)
Diluted	$ (0.08)	$ (0.07)	$ (0.09)	$ (0.02)
Loss per subordinated unit:
Basic	$ (0.08)	$ (0.07)	$ (0.09)	$ (0.02)
Diluted	$ (0.08)	$ (0.07)	$ (0.09)	$ (0.02)