CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Operating revenues:
Drilling - U.S. Land	$ 461,640	$ 263,636
Drilling - Offshore	33,366	33,812
Drilling - International Land	63,214	68,031
Other	5,867	3,111
Total operating revenues	564,087	368,590
Operating costs and expenses:
Operating costs, excluding depreciation and amortization	373,083	247,679
Depreciation and amortization	143,267	133,847
Research and development	3,234	2,808
General and administrative	46,548	34,262
Income from asset sales	(5,565)	(842)
Total operating costs and expenses	560,567	417,754
Operating income (loss) from continuing operations	3,520	(49,164)
Other income (expense):
Interest and dividend income	1,724	990
Interest expense	(5,773)	(5,055)
Other	530	387
Total other income (expense)	(3,519)	(3,678)
Income (loss) from continuing operations before income taxes	1	(52,842)
Income tax benefit	(500,641)	(18,288)
Income (loss) from continuing operations	500,642	(34,554)
Loss from discontinued operations before income taxes	(519)	(424)
Income tax provision	17	85
Loss from discontinued operations	(536)	(509)
NET INCOME (LOSS)	$ 500,106	$ (35,063)
Basic earnings per common share:
Income (loss) from continuing operations (in dollars per share)	$ 4.57	$ (0.33)
Net income (loss) (in dollars per share)	4.57	(0.33)
Diluted earnings per common share:
Income (loss) from continuing operations (in dollars per share)	4.55	(0.33)
Net income (loss) (in dollars per share)	$ 4.55	$ (0.33)
Weighted average shares outstanding (in thousands):
Basic (in shares)	108,683	108,276
Diluted (in shares)	109,095	108,276
Dividends declared per common share (in dollars per share)	$ 0.7	$ 0.7000