Quarterly report pursuant to Section 13 or 15(d)

Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements (Details)

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Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Dec. 31, 2010
Current assets:        
Cash and cash equivalents $ 77,467 $ 97,869 $ 67,495 $ 51,431
Accounts and notes receivable, net 176,190 183,923    
Rig materials and supplies 24,246 29,947    
Deferred costs 2,859 3,249    
Deferred income taxes 6,380 6,650    
Other tax assets 34,517 25,358    
Assets held for sale 5,312 5,315    
Other current assets 12,363 15,302    
Total current assets 339,334 367,613    
Property, plant and equipment, net 770,761 719,809    
Other noncurrent assets 127,271 128,824    
Total assets 1,237,366 1,216,246    
Current liabilities:        
Current portion of long-term debt 51,136 145,723    
Accounts payable and accrued liabilities 107,461 135,250    
Accrued income taxes 5,271 4,837    
Total current liabilities 163,868 285,810    
Long-term debt 429,888 337,000    
Other long-term liabilities 29,535 33,452    
Long-term deferred tax liability 17,830 15,934    
Contingencies (Note 11)          
Stockholders' equity:        
Common stock 19,696 19,508    
Capital in excess of par value 642,616 637,042    
Retained earnings (accumulated deficit) (65,469) (111,944)    
Total controlling interest stockholders' equity 596,843 544,606    
Noncontrolling interest (598) (556)    
Total equity 596,245 544,050    
Total liabilities and stockholders' equity 1,237,366 1,216,246    
Parent Company [Member]
       
Current assets:        
Cash and cash equivalents 28,231 55,670 30,839 13,835
Accounts and notes receivable, net 289,720 289,512    
Other tax assets 77,635 47,834    
Other current assets 722 788    
Total current assets 396,308 393,804    
Property, plant and equipment, net 60 79    
Investment in subsidiaries and intercompany advances 776,638 720,214    
Other noncurrent assets 40,616 44,962    
Total assets 1,213,622 1,159,059    
Current liabilities:        
Current portion of long-term debt 51,136 145,723    
Accounts payable and accrued liabilities 63,599 60,120    
Accrued income taxes (920) (205)    
Total current liabilities 113,815 205,638    
Long-term debt 429,888 337,000    
Other long-term liabilities 8,263 8,081    
Long-term deferred tax liability 2,229 1,151    
Intercompany payables 62,584 62,583    
Contingencies (Note 11)          
Stockholders' equity:        
Common stock 19,696 19,508    
Capital in excess of par value 642,616 637,042    
Retained earnings (accumulated deficit) (65,469) (111,944)    
Total controlling interest stockholders' equity 596,843 544,606    
Total equity 596,843 544,606    
Total liabilities and stockholders' equity 1,213,622 1,159,059    
Guarantor Subsidiaries [Member]
       
Current assets:        
Cash and cash equivalents 10,266 4,212 7,921 2,317
Accounts and notes receivable, net 107,730 94,748    
Rig materials and supplies (1,044) 762    
Deferred income taxes 4,940 5,311    
Other tax assets (47,411) (25,218)    
Other current assets 5,144 6,381    
Total current assets 79,625 86,196    
Property, plant and equipment, net 544,681 474,942    
Investment in subsidiaries and intercompany advances (257,178) (212,883)    
Other noncurrent assets 68,171 66,660    
Total assets 435,299 414,915    
Current liabilities:        
Accounts payable and accrued liabilities 71,396 94,056    
Accrued income taxes 1,444 921    
Total current liabilities 72,840 94,977    
Other long-term liabilities 6,912 9,474    
Long-term deferred tax liability 27,870 25,232    
Intercompany payables 43,657 43,657    
Contingencies (Note 11)          
Stockholders' equity:        
Common stock 18,049 18,049    
Capital in excess of par value 733,112 733,120    
Retained earnings (accumulated deficit) (467,141) (509,594)    
Total controlling interest stockholders' equity 284,020 241,575    
Total equity 284,020 241,575    
Total liabilities and stockholders' equity 435,299 414,915    
Non-Guarantor Subsidiaries [Member]
       
Current assets:        
Cash and cash equivalents 38,970 37,987 28,735 35,279
Accounts and notes receivable, net 282,476 285,326    
Rig materials and supplies 25,290 29,185    
Deferred costs 2,859 3,249    
Deferred income taxes 1,440 853    
Other tax assets 4,293 2,742    
Assets held for sale 5,312 5,315    
Other current assets 6,497 8,133    
Total current assets 367,137 372,790    
Property, plant and equipment, net 226,020 244,787    
Investment in subsidiaries and intercompany advances 1,384,083 1,347,719    
Other noncurrent assets 18,484 16,839    
Total assets 1,995,724 1,982,135    
Current liabilities:        
Accounts payable and accrued liabilities 190,474 181,010    
Accrued income taxes 4,747 4,121    
Total current liabilities 195,221 185,131    
Other long-term liabilities 14,360 15,897    
Long-term deferred tax liability (12,269) (11,296)    
Intercompany payables 103,625 111,619    
Contingencies (Note 11)          
Stockholders' equity:        
Common stock 43,003 43,003    
Capital in excess of par value 1,449,633 1,444,091    
Retained earnings (accumulated deficit) 202,749 194,246    
Total controlling interest stockholders' equity 1,695,385 1,681,340    
Noncontrolling interest (598) (556)    
Total equity 1,694,787 1,680,784    
Total liabilities and stockholders' equity 1,995,724 1,982,135    
Consolidation, Eliminations [Member]
       
Current assets:        
Accounts and notes receivable, net (503,736) (485,663)    
Deferred income taxes   486    
Total current assets (503,736) (485,177)    
Property, plant and equipment, net 0 1    
Investment in subsidiaries and intercompany advances (1,903,543) (1,855,050)    
Other noncurrent assets   363    
Total assets (2,407,279) (2,339,863)    
Current liabilities:        
Accounts payable and accrued liabilities (218,008) (199,936)    
Total current liabilities (218,008) (199,936)    
Long-term deferred tax liability   847    
Intercompany payables (209,866) (217,859)    
Contingencies (Note 11)         
Stockholders' equity:        
Common stock (61,052) (61,052)    
Capital in excess of par value (2,182,745) (2,177,211)    
Retained earnings (accumulated deficit) 264,392 315,348    
Total controlling interest stockholders' equity (1,979,405) (1,922,915)    
Total equity (1,979,405) (1,922,915)    
Total liabilities and stockholders' equity $ (2,407,279) $ (2,339,863)