Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 10,663	$ 17,476
Trade accounts receivable, net of allowances for doubtful accounts of $297 in 2012 and $235 in 2011	20,455	11,227
Inventories	16,341	16,966
Deferred tax asset	337	100
Prepaid expenses and other current assets	2,345	1,601
Total current assets	50,141	47,370
Property, plant, and equipment:
Land and building	2,178	2,175
Compressors and equipment	153,135	137,868
Vehicles	12,687	12,881
Construction in progress	265	81
Total property, plant, and equipment	168,265	153,005
Less accumulated depreciation	(75,052)	(66,698)
Net property, plant, and equipment	93,213	86,307
Other assets:
Goodwill	72,161	72,161
Patents, trademarks and other intangible assets, net of accumulated amortization of $669 in 2012 and $592 in 2011	0	28
Deferred tax asset	0	129
Other assets	277	349
Total other assets	72,438	72,667
Total assets	215,792	206,344
Current liabilities:
Accounts payable	4,400	3,916
Accrued liabilities and other	5,920	2,941
Amounts payable to affiliates	11,528	6,470
Total current liabilities	21,848	13,327
Other liabilities:
Long-term debt, net	5,800	0
Deferred tax liabilities	5,022	4,281
Other long-term liabilities	50	92
Total other liabilities	10,872	4,373
Partners' capital:
General partner interest	3,375	3,515
Common units (9,163,738 units issued and outstanding)	109,182	111,989
Subordinated units (6,273,970 units issued and outstanding)	69,501	72,238
Accumulated other comprehensive income	1,014	902
Total partners' capital	183,072	188,644
Total liabilities and partners' capital	$ 215,792	$ 206,344