Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Revenues:
Contract drilling	$ 861,511	$ 748,998	$ 2,520,030	$ 2,405,175
Revenues related to reimbursable expenses	16,666	50,726	54,032	76,833
Total revenues	878,177	799,724	2,574,062	2,482,008
Operating expenses:
Contract drilling, excluding depreciation	391,369	350,555	1,141,739	1,008,551
Reimbursable expenses	16,206	50,313	52,443	75,397
Depreciation	101,175	99,117	303,523	297,265
General and administrative	14,879	16,999	48,976	50,502
Bad debt expense (recovery)	4,734	(2,048)	(5,413)	(5,946)
Gain on disposition of assets	(463)	(32,392)	(4,344)	(33,425)
Total operating expenses	527,900	482,544	1,536,924	1,392,344
Operating income	350,277	317,180	1,037,138	1,089,664
Other income (expense):
Interest income	2,024	395	3,565	2,154
Interest expense	(15,874)	(22,567)	(60,144)	(66,221)
Foreign currency transaction gain (loss)	(1,442)	3,724	(4,603)	194
Other, net	(136)	(166)	(232)	(287)
Income before income tax expense	334,849	298,566	975,724	1,025,504
Income tax expense	(77,995)	(100,042)	(201,672)	(311,734)
Net income	$ 256,854	$ 198,524	$ 774,052	$ 713,770
Income per share:
Basic	$ 1.85	$ 1.43	$ 5.57	$ 5.13
Diluted	$ 1.85	$ 1.43	$ 5.57	$ 5.13
Weighted-average shares outstanding:
Shares of common stock	139,027	139,027	139,027	139,026
Dilutive potential shares of common stock	14	10	21	55
Total weighted-average shares outstanding	139,041	139,037	139,048	139,081
Cash dividends declared per share of common stock	$ 0.875	$ 0.875	$ 2.625	$ 4.375