Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Operating activities
Net income (loss)	$ 27,954	$ 18,987
Reconciliation of net income (loss) to cash provided by operating activities
Depreciation, depletion, amortization, and accretion	61,795	72,542
Impairments of long-lived assets	12,534	9,927
Provision (benefit) for deferred income taxes	9,754	(1,217)
Stock compensation expense	3,140	3,055
Provision (benefit) for doubtful accounts	974	(1,302)
(Gain) loss on sale of property, plant, and equipment	(60,309)	250
Non-cash income from sold hedge derivatives	0	(11,161)
Other non-cash charges and credits	19,997	2,370
Proceeds from insurance settlements	0	39,772
Changes in operating assets and liabilities, net of assets acquired
Accounts receivable	597	(1,802)
Inventories	11,812	12,445
Prepaid expenses and other current assets	28,952	(557)
Trade accounts payable and accrued expenses	(17,608)	(19,672)
Decommissioning liabilities	(43,572)	(33,796)
Operating activities of discontinued operations	35	(380)
Other	3,859	993
Net cash provided by operating activities	59,914	90,454
Investing activities
Purchases of property, plant, and equipment	(36,284)	(33,866)
Business combinations	(1,500)	0
Proceeds from sale of property, plant, and equipment	187,384	353
Other investing activities	(4,929)	(303)
Net cash provided by (used in) investing activities	144,671	(33,816)
Financing activities
Proceeds from long-term debt	0	35
Proceeds from exercise of stock options	2,245	732
Proceeds from issuance of Compressco Partners' common units, net of underwriters' discount	50,234	0
Compressco Partners' offering costs	(2,038)	0
Excess tax benefit from exercise of stock options	1,394	250
Net cash provided by financing activities	51,835	1,017
Effect of exchange rate changes on cash	1,994	(1,822)
Increase in cash and cash equivalents	258,414	55,833
Cash and cash equivalents at beginning of period	65,360	33,394
Cash and cash equivalents at end of period	323,774	89,227
Supplemental cash flow information
Interest paid	9,073	9,007
Income taxes paid (refunded)	(16,138)	25,391
Supplemental disclosure of non-cash investing and financing activities
Adjustment of fair value of decommissioning liabilities capitalized to oil and gas properties	$ 1,810	$ 4,447