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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).

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- Definition Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section A -Paragraph 4, 21 -Chapter 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(c)(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph c(3) -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 310 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6471842&loc=d3e55302-109406 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant