CONSOLIDATED CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Current assets:
Cash and cash equivalents	$ 898,013	$ 729,384
Short-term investments	45,526	45,543
Accounts receivable, less reserve of $5,148 at March 31, 2016 and $6,181 at September 30, 2015	330,726	445,948
Inventories	129,649	128,541
Deferred income taxes		17,206
Prepaid expenses and other	56,233	64,475
Current assets of discontinued operations	230	8,097
Total current assets	1,460,377	1,439,194
Investments	83,363	104,354
Property, plant and equipment, net	5,446,352	5,563,170
Other assets	35,013	40,524
Total assets	7,025,105	7,147,242
Current liabilities:
Long-term debt due within one year less unamortized debt issuance costs	39,144	39,094
Accounts payable	91,437	108,169
Accrued liabilities	240,665	197,557
Current liabilities of discontinued operations	82	3,377
Total current liabilities	371,328	348,197
Noncurrent liabilities:
Long-term debt less unamortized discount and debt issuance costs	492,919	492,443
Deferred income taxes	1,278,664	1,295,916
Other	95,984	110,120
Noncurrent liabilities of discontinued operations	4,110	4,720
Total noncurrent liabilities	1,871,677	1,903,199
Shareholders' equity:
Common stock, $.10 par value, 160,000,000 shares authorized, 111,356,865 shares and 110,987,546 shares issued as of March 31, 2016 and September 30, 2015, respectively and 108,039,174 shares and 107,767,915 shares outstanding as of March 31, 2016 and September 30, 2015, respectively	$ 11,136	$ 11,099
Preferred stock, no par value, 1,000,000 shares authorized, no shares issued
Additional paid-in capital	$ 436,117	$ 420,141
Retained earnings	4,536,047	4,648,346
Accumulated other comprehensive loss	(13,214)	(1,377)
Treasury stock, at cost	(187,986)	(182,363)
Total shareholders' equity	4,782,100	4,895,846
Total liabilities and shareholders' equity	$ 7,025,105	$ 7,147,242

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).