Consolidated Balance Sheets (Imported) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010		Dec. 31, 2009
Current assets:
Cash and cash equivalents	$ 437,100	$ 546,463	$ 391,084
Accounts receivable - Trade, net of allowance for uncollectible accounts of $5,152 and $4,000, respectively	152,233	147,899
Unbilled revenue	26,992	24,338
Costs in excess of billing	6,848	13,037
Other current assets	96,934	93,584
Current assets of discontinued operations	84,000	118,921
Total current assets	804,107	944,242
Property and equipment	2,051,796	1,815,012
Less accumulated depreciation	(565,921)	(355,343)
Property and equipment, net	1,485,875	1,459,669	1,452,842
Other assets:
Equity investments	167,599	175,656
Goodwill	62,935	62,215	62,494	[1]
Other assets, net	49,837	35,166
Non-current assets of discontinued operations	816,227	905,399
Total assets	3,386,580	3,582,347	3,592,020
Current liabilities:
Accounts payable	92,398	73,919
Accrued liabilities	161,514	146,112
Income tax payable		1,293
Current maturities of long-term debt	16,607	7,877
Current liabilities of discontinued operations	182,527	166,975
Total current liabilities	453,046	396,176
Long-term debt	1,002,621	1,147,444
Deferred tax liabilities	359,237	417,610
Other non-current liabilities	5,025	9,368
Non-current liabilities of discontinued operations	147,237	161,208
Total liabilities	1,967,166	2,131,806
Convertible preferred stock		1,000
Commitments and contingencies
Shareholders' equity:
Common stock, no par, 240,000 shares authorized, 105,763 and 105,530 shares issued, respectively	932,742	908,776
Retained earnings	476,310	522,644
Accumulated other comprehensive loss	(15,667)	(10,017)
Total controlling interest shareholders' equity	1,393,385	1,421,403
Noncontrolling interests	26,029	28,138
Total equity	1,419,414	1,449,541	1,285,644		1,427,462
Total liabilities and shareholders' equity	$ 3,386,580	$ 3,582,347

[1] In 2010, we fully impaired $16.7 million of goodwill associated with our Australian well intervention subsidiary (“WOSEA”) (see below).