CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) income	$ (12,620,000)	$ 10,480,000	$ 11,113,000	[1]
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation	40,168,000	37,095,000	32,498,000
Noncash compensation	1,225,000	1,797,000	1,489,000
Deferred income tax (benefit) expense	(6,067,000)	8,273,000	4,913,000
Provision for bad debt		63,000	327,000
Other	(57,000)	(118,000)	192,000
Change in current assets and liabilities:
(Increase) decrease in accounts receivable	(2,507,000)	16,168,000	32,670,000
(Increase) decrease in prepaid expenses and other assets	(1,683,000)	25,000	3,359,000
Decrease in accounts payable	(3,467,000)	(2,952,000)	(1,593,000)
Decrease in accrued liabilities	(1,909,000)	(223,000)	(2,439,000)
Decrease in deferred revenue	(2,637,000)	(29,000)	(6,149,000)
Net cash provided by operating activities	10,446,000	70,579,000	76,380,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures, net of noncash capital expenditures summarized below	(35,281,000)	(48,485,000)	(44,832,000)
Proceeds from maturity of short-term investments	29,250,000	10,750,000	500,000
Acquisition of short-term investments	(32,750,000)	(30,250,000)	(4,500,000)
Proceeds from disposal of assets	2,686,000	481,000	252,000
Net cash used by investing activities	(36,095,000)	(67,504,000)	(48,580,000)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from notes payable	10,000,000	983,000	9,346,000
Principal payments on notes payable	(10,823,000)	(8,898,000)	(5,814,000)
Principal payments on capital lease obligations	(932,000)	(736,000)	(220,000)
Proceeds from exercise of stock options	32,000	608,000	184,000
Dividends paid	(1,935,000)
Net cash (used) provided by financing activities	(3,658,000)	(8,043,000)	3,496,000
Effect of exchange rate changes in cash and cash equivalents	(345,000)
Net (decrease) increase in cash and cash equivalents	(29,652,000)	(4,968,000)	31,296,000
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	52,405,000	57,373,000	26,077,000
CASH AND CASH EQUIVALENTS AT END OF PERIOD	22,753,000	52,405,000	57,373,000
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for interest	537,000	688,000	618,000
Cash paid for income taxes	735,000	1,665,000	262,000
Cash received for income taxes	3,000	42,000	3,258,000
NONCASH INVESTING AND FINANCING ACTIVITIES:
(Decrease) increase in accrued purchases of property and equipment	(1,693,000)	288,000	1,405,000
Capital lease obligations incurred	$ 485,000	$ 1,296,000	$ 1,427,000

[1] The 2012 earnings per share calculations have been adjusted for the two-class method to reflect restricted shares that were not reflected as participating in the prior period. Basic earnings per share as previously reported for the year ended September 30, 2012 was $1.42. Diluted earnings per share as previously reported for the year ended September 30, 2012 was $1.40. Basic weighted average shares outstanding as previously reported for the year ended September 30, 2012 was 7,841,722. Diluted weighted average shares outstanding as previously reported for the year ended September 30, 2012 was 7,931,593. The impact on all prior period financial statements is deemed immaterial.