CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
CURRENT ASSETS:
Cash and cash equivalents	$ 328,290	$ 438,853
Receivables - trade and other	403,465	283,592
Prepaid expenses and other current assets	64,895	44,586
Deferred tax assets - net	42,899	27,023
Assets of discontinued operations	26,948	27,661
Total current assets	866,497	821,715
PROPERTY, PLANT AND EQUIPMENT - at cost:
Drilling equipment	6,671,638	6,179,587
Construction in progress	738,439	711,558
Other property and equipment	136,955	138,177
Property, plant and equipment - gross	7,547,032	7,029,322
Less accumulated depreciation and amortization	1,525,083	1,350,609
Property, plant and equipment - net	6,021,949	5,678,713
Other assets	100,400	97,417
TOTAL ASSETS	6,988,846	6,597,845
CURRENT LIABILITIES:
Current maturities of long-term debt	0	45,023
Accounts payable - trade	90,101	111,082
Deferred revenues	35,975	36,220
Accrued pension and other postretirement benefits	14,515	55,244
Accrued compensation and related employee costs	41,520	31,205
Accrued income taxes	7,619	9,878
Accrued interest	17,682	25,477
Other current liabilities	21,036	9,237
Liabilities of discontinued operations	21,255	25,005
Total current liabilities	249,703	348,371
Long-term debt - less current maturities	1,393,151	1,089,335
Other liabilities	380,430	357,709
Deferred income taxes - net	487,251	476,443
Commitments and contingent liabilities (Note 6)	0	0
SHAREHOLDER'S EQUITY:
Common stock	0	15,947
Additional paid-in capital	1,367,208	1,478,233
Retained earnings	3,312,893	3,186,362
Cost of 549,473 and 3,996,465 treasury shares, respectively	(1,914)	(128,884)
Accumulated other comprehensive loss	(215,468)	(225,671)
Total shareholders' equity	4,478,311	4,325,987
TOTAL LIABILITIES AND EQUITY	6,988,846	6,597,845
Common Class A [Member]
SHAREHOLDER'S EQUITY:
Common stock	$ 15,592	$ 0