Consolidated Statements of Operations (USD $)	3 Months Ended			9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012		Jun. 30, 2013	Jun. 30, 2012
Operating revenues	$ 75,647,000	$ 68,348,000		$ 235,626,000	$ 246,276,000
Operating costs:
Operating expenses	56,519,000	55,652,000		174,920,000	199,668,000
General and administrative	3,046,000	2,570,000		10,150,000	8,046,000
Depreciation	9,231,000	8,328,000		27,913,000	24,092,000
Operating costs, Total	68,796,000	66,550,000		212,983,000	231,806,000
Income from operations	6,851,000	1,798,000		22,643,000	14,470,000
Other income (expense):
Interest income	14,000	5,000		49,000	16,000
Interest expense	(159,000)	(134,000)		(524,000)	(422,000)
Other (expense) income	(107,000)	311,000		71,000	423,000
Income before income tax	6,599,000	1,980,000		22,239,000	14,487,000
Income tax expense	(2,536,000)	(839,000)		(8,969,000)	(4,526,000)
Net income	$ 4,063,000	$ 1,141,000	[1]	$ 13,270,000	$ 9,961,000	[1]
Basic income attributable to common stock	$ 0.50	$ 0.14	[1]	$ 1.65	$ 1.26	[1]
Diluted income attributable to common stock	$ 0.50	$ 0.14	[1]	$ 1.64	$ 1.25	[1]
Weighted average equivalent common shares outstanding	7,873,698	7,846,417	[1]	7,861,425	7,839,983	[1]
Weighted average equivalent common shares outstanding -assuming dilution	7,922,556	7,872,423	[1]	7,900,126	7,881,187	[1]

[1] Prior year earnings per share calculations have been adjusted for the two-class method to reflect restricted shares that were not reflected as participating in prior periods. Basic earnings per share as previously reported for the quarter and nine months ended June 30, 2012 was $0.15 and $1.27, respectively. Diluted earnings per share as previously reported for the quarter and nine months ended June 30, 2012 was $0.14 and $1.26, respectively. Basic weighted average shares outstanding as previously reported for the quarter and nine months ended June 30, 2012 were 7,846,417 and 7,839,983, respectively. Diluted weighted average shares outstanding as previously reported for the quarter and nine months ended June 30, 2012 were 7,924,009 and 7,934,367, respectively. The impact on all prior period financial statements is deemed immaterial.