Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	Dec. 31, 2007	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Goodwill, Purchase Accounting Adjustments		$ 32.9
Net operating loss carryforwards recognized	8.0
Net operating loss carryforwards amount		73.8
Tax refund on amended returns		6.2
Reduction in federal tax liability		19.6
Unrecognized tax benefits, income tax penalties and interest accrued		1.9	1.8
Income tax examination, penalties and interest expense		0.1	0	(0.1)
State and Local Jurisdiction [Member]
State operating loss carryforwards		35.3
NOL carryforwards expiration date		July 31, 2031
Operating loss carryforwards, valuation allowance		30.4
Maximum [Member]
Reversal amount of other long-term liabilities and accrued interest and penalties		27.6
Minimum [Member]
Reversal amount of other long-term liabilities and accrued interest and penalties		$ 0