Acquisitions Pleasant Prairie Quarterly Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended		10 Months Ended
	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013 Plesant Prairie [Member]
Business Acquisition [Line Items]
Revenues	$ 206,598	$ 166,059	$ 182,146	$ 145,383	$ 148,851	$ 142,021	$ 162,831	$ 132,371	$ 700,186	$ 586,074	$ 57,661
Net income	$ 6,456	$ 5,282	$ 7,249	$ 2,583	$ 3,626	$ 2,416	$ 5,905	$ 1,579	$ 21,570	$ 13,526	$ 1,695