Consolidated Statements Of Comprehensive Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Revenues	$ 133,752	$ 120,266	$ 270,088	$ 240,345
Cost of services	112,044	100,240	225,676	202,202
Gross profit	21,708	20,026	44,412	38,143
Selling, general and administrative expenses	19,409	19,172	38,107	36,744
Gain (loss) on sale of assets	1	(22)	7	(62)
Income from operations	2,298	876	6,298	1,461
Interest and other (income) expense:
Interest expense	311	401	599	919
Other income, net	(171)	(15)	(199)	(212)
Income from operations before income taxes	2,158	490	5,898	754
Provision (benefit) for income taxes	304	44	569	43
Net income from continuing operations	1,854	446	5,329	711
Net loss from discontinued operations	(44)	(49)	(226)	(191)
Net income	1,810	397	5,103	520
Unrealized gain on interest hedge, net of tax	0	8	0	8
Comprehensive income	$ 1,810	$ 405	$ 5,103	$ 528
Basic earnings (loss) per share:
From continuing operations	$ 0.08	$ 0.02	$ 0.25	$ 0.04
From discontinued operations	$ 0	$ 0	$ (0.01)	$ (0.01)
Basic earnings per share	$ 0.08	$ 0.02	$ 0.24	$ 0.03
Diluted earnings (loss) per share:
From continuing operations	$ 0.08	$ 0.02	$ 0.25	$ 0.04
From discontinued operations	$ 0	$ 0	$ (0.01)	$ (0.01)
Diluted earnings per share	$ 0.08	$ 0.02	$ 0.24	$ 0.03
Shares used in the computation of earnings per share
Basic	21,571,034	18,464,931	21,653,711	18,443,936
Diluted	21,618,327	18,514,150	21,697,568	18,507,637