Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 17,476	$ 6,629
Trade accounts receivable, net of allowances for doubtful accounts of $235 in 2011 and $304 in 2010	11,227	9,241
Inventories	16,966	17,731
Deferred tax asset	100	580
Prepaid expenses and other current assets	1,601	1,361
Total current assets	47,370	35,542
Property, plant, and equipment:
Land and building	2,175	2,143
Compressors and equipment	137,868	128,939
Vehicles	12,881	13,152
Construction in progress	81	0
Total property, plant, and equipment	153,005	144,234
Less accumulated depreciation	(66,698)	(55,892)
Net property, plant, and equipment	86,307	88,342
Other assets:
Goodwill	72,161	72,161
Patents, trademarks and other intangible assets, net of accumulated amortization of $469 in 2011 and $566 in 2010	28	102
Deferred tax asset	129	0
Other assets	349	419
Total other assets	72,667	72,682
Total assets	206,344	196,566
Current liabilities:
Accounts payable	3,916	1,939
Accrued liabilities and other	2,941	4,660
Amounts payable to affiliates	6,470	0
Total current liabilities	13,327	6,599
Other liabilities:
Affiliate note payable	0	145,085
Deferred tax liabilities	4,281	18,881
Other long-term liabilities	92	48
Total other liabilities	4,373	164,014
Partners' equity:
Net parent equity	0	25,953
Common units (9,101,308 units issued and outstanding)	111,989	0
Subordinated units (6,273,970 units issued and outstanding)	72,238	0
General partner interest	3,515	0
Accumulated other comprehensive income	902	0
Total partners' equity	188,644	25,953
Total liabilities and partners' equity	$ 206,344	$ 196,566