CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Operating revenues:
Drilling - U.S. Land	$ 285,028	$ 494,615	$ 1,004,116	$ 2,103,125
Drilling - Offshore	30,492	57,071	106,697	189,386
Drilling - International Land	47,983	106,551	171,529	304,262
Other	2,983	3,208	10,182	11,129
Total operating revenues	366,486	661,445	1,292,524	2,607,902
Operating costs and other:
Operating costs, excluding depreciation	186,146	350,640	684,401	1,377,202
Depreciation	138,690	144,965	422,336	433,445
Asset impairment charge	6,250		6,250
General and administrative	46,496	29,253	112,381	96,984
Research and development	2,707	3,329	7,941	12,344
Income from asset sales	(547)	(1,791)	(7,820)	(8,819)
Total operating costs and expenses	379,742	526,396	1,225,489	1,911,156
Operating income (loss) from continuing operations	(13,256)	135,049	67,035	696,746
Other income (expense):
Interest and dividend income	778	1,588	2,310	4,447
Interest expense	(6,407)	(6,136)	(16,652)	(9,326)
Other	534	(281)	926	88
Total other income (expense)	(5,095)	(4,829)	(13,416)	(4,791)
Income (loss) from continuing operations before income taxes	(18,351)	130,220	53,619	691,955
Income tax provision	2,842	39,321	33,740	243,891
Income (loss) from continuing operations	(21,193)	90,899	19,879	448,064
Income (loss) from discontinued operations before income taxes	2,193	(27)	2,241	(118)
Income tax provision	2,200		6,113	(77)
Loss from discontinued operations	(7)	(27)	(3,872)	(41)
NET INCOME (LOSS)	$ (21,200)	$ 90,872	$ 16,007	$ 448,023
Basic earnings per common share:
Income (loss) from continuing operations (in dollars per share)	$ (0.20)	$ 0.84	$ 0.18	$ 4.13
Loss from discontinued operations (in dollars per share)			(0.04)
Net income (loss) (in dollars per share)	(0.20)	0.84	0.14	4.13
Diluted earnings per common share:
Income (loss) from continuing operations (in dollars per share)	(0.20)	0.83	0.17	4.10
Loss from discontinued operations (in dollars per share)			(0.04)
Net income (loss) (in dollars per share)	$ (0.20)	$ 0.83	$ 0.13	$ 4.10
Weighted average shares outstanding (in thousands):
Basic (in shares)	108,047	107,652	107,970	107,759
Diluted (in shares)	108,047	108,469	108,523	108,571
Dividends declared per common share (in dollars per share)	$ 0.7000	$ 0.6875	$ 2.075	$ 2.0625