Quarterly Results Quarterly Results (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2014	Oct. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 269,844	$ 216,389	$ 208,972	$ 183,539	$ 206,598	$ 166,059	$ 182,146	$ 145,383
Gross Profit	18,654	22,100	21,001	17,846	22,086	16,374	19,336	10,738	79,601	67,152
Operating Income	719	9,726	12,699	8,021	10,778	8,187	11,508	4,131	31,165	34,604
Provision for income taxes	(1,389)	335	3,620	2,181	3,605	2,213	3,686	1,101	4,747	10,605
Net income	$ 1,027	$ 8,349	$ 8,129	$ 4,939	$ 6,456	$ 5,282	$ 7,249	$ 2,583	$ 22,444	$ 21,570
Net income per basic share	$ 0.06	$ 0.49	$ 0.48	$ 0.29	$ 0.38	$ 0.31	$ 0.43	$ 0.15	$ 1.31	$ 1.27
Net income per share diluted share	$ 0.06	$ 0.49	$ 0.47	$ 0.29	$ 0.38	$ 0.31	$ 0.43	$ 0.15	$ 1.30	$ 1.27
Basic	17,180	17,118	17,081	17,113	16,999	17,007	16,998	16,988	17,145	16,982
Diluted	17,229	17,175	17,158	17,208	17,052	17,051	17,043	17,040	17,215	17,030