CONSOLIDATED CONDENSED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Operating revenues:
Drilling - U.S. Land	$ 695,816	$ 706,786	$ 2,077,556	$ 1,983,369
Drilling - Offshore	53,859	41,617	167,182	135,830
Drilling - International Land	86,978	67,482	268,337	192,305
Other	3,544	3,900	10,003	10,851
Total operating revenues	840,197	819,785	2,523,078	2,322,355
Operating costs and other:
Operating costs, excluding depreciation	450,990	463,935	1,379,598	1,303,175
Depreciation	117,790	95,182	336,822	272,404
General and administrative	31,090	25,576	96,347	79,544
Research and development	4,373	4,299	11,422	11,378
Income from asset sales	(4,006)	(1,862)	(14,538)	(14,365)
Total operating costs and expenses	600,237	587,130	1,809,651	1,652,136
Operating income from continuing operations	239,960	232,655	713,427	670,219
Other income (expense):
Interest and dividend income	341	329	1,082	1,021
Interest expense	(2,091)	(2,411)	(4,585)	(7,293)
Gain from sale of investment securities	153,369		162,121
Other	(1,214)	309	(3,195)	288
Total other income (expense)	150,405	(1,773)	155,423	(5,984)
Income from continuing operations before income taxes	390,365	230,882	868,850	664,235
Income tax provision	139,387	80,939	307,194	240,232
Income from continuing operations	250,978	149,943	561,656	424,003
Income (loss) from discontinued operations before income taxes	15,181	(18)	14,701	(154)
Income tax provision			(485)	(81)
Income (loss) from discontinued operations	15,181	(18)	15,186	(73)
NET INCOME	$ 266,159	$ 149,925	$ 576,842	$ 423,930
Basic earnings per common share:
Income from continuing operations (in dollars per share)	$ 2.35	$ 1.40	$ 5.26	$ 3.94
Income from discontinued operations (in dollars per share)	$ 0.14		$ 0.14
Net income (in dollars per share)	$ 2.49	$ 1.40	$ 5.40	$ 3.94
Diluted earnings per common share:
Income from continuing operations (in dollars per share)	$ 2.32	$ 1.38	$ 5.19	$ 3.88
Income from discontinued operations (in dollars per share)	$ 0.14		$ 0.14
Net income (in dollars per share)	$ 2.46	$ 1.38	$ 5.33	$ 3.88
Weighted average shares outstanding:
Basic (in shares)	106,430	107,016	106,206	107,196
Diluted (in shares)	107,826	108,425	107,717	108,798
Dividends declared per common share (in dollars per share)	$ 0.50	$ 0.07	$ 0.80	$ 0.21