CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
ASSETS
Cash	$ 113,983	$ 80,080
Accounts receivable	311,514	242,684
Income tax receivable	8,705	6,260
Inventories of materials and supplies	137,998	132,368
Prepaid expenses, deferred costs and other current assets	35,475	36,415
Total current assets	607,675	497,807
Property and equipment, net	4,172,132	3,967,028
Other receivables	11,831	11,831
Deferred income taxes	150	589
Deferred costs and other assets	17,223	29,973
Total assets	4,809,011	4,507,228
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable	70,161	94,315
Accrued liabilities	23,572	19,158
Dividends payable	16,164	16,090
Short-term debt	0	11,885
Interest payable	7,704	8,099
Income tax payable	13,906	14,234
Deferred credits and other liabilities	3,941	3,596
Total current liabilities	135,448	167,377
Long-term debt	1,685,946	1,742,122
Deferred income taxes	1,658	783
Deferred credits	800	4,100
Other	37,989	37,322
Total long-term liabilities	$ 1,726,393	$ 1,784,327
Commitments and contingencies
Shareholders’ equity:
Preferred stock, no par value, 1,000 shares authorized, none outstanding	$ 0	$ 0
Common stock, $1.00 par value, 180,000 shares authorized with 64,654 issued and outstanding at September 30, 2015 and 180,000 shares authorized and 64,362 shares issued and outstanding at September 30, 2014	64,654	64,362
Paid-in capital	213,096	201,464
Retained earnings	2,670,148	2,286,137
Accumulated other comprehensive income (loss)	(728)	3,561
Total shareholders’ equity	2,947,170	2,555,524
Total liabilities and shareholders’ equity	$ 4,809,011	$ 4,507,228