CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Apr. 30, 2017	Jul. 31, 2016
Current assets:
Cash and cash equivalents	$ 30,873,000	$ 28,367,000
Accounts receivable, net of allowance for doubtful accounts of $1,854 at April 30 and $1,850 at July 31	110,596,000	93,332,000
Inventories, net	102,805,000	91,486,000
Prepaid expenses and other current assets	13,191,000	9,557,000
Total current assets	257,465,000	222,742,000
Property and equipment, net	85,690,000	74,604,000
Intangible assets, net	128,139,000	111,719,000
Goodwill	308,169,000	280,318,000
Other assets	4,919,000	5,149,000
Total assets	784,382,000	694,532,000
Current liabilities:
Accounts payable	33,834,000	26,263,000
Compensation payable	24,427,000	25,555,000
Accrued expenses	24,468,000	20,283,000
Deferred revenue	22,686,000	20,173,000
Income taxes payable	1,915,000	4,061,000
Total current liabilities	107,330,000	96,335,000
Long-term debt	145,000,000	116,000,000
Deferred income taxes	23,343,000	23,579,000
Other long-term liabilities	4,832,000	4,248,000
Commitments and contingencies
Stockholders' equity:
Preferred Stock, par value $1.00 per share; authorized 1,000,000 shares; none issued
Common Stock, par value $.10 per share; authorized 75,000,000 shares; issued April 30 - 46,182,454 shares, outstanding April 30 - 41,724,048 shares; issued July 31 - 46,084,047 shares, outstanding July 31 - 41,708,214 shares	4,618,000	4,608,000
Additional paid-in capital	172,546,000	165,573,000
Retained earnings	393,513,000	342,053,000
Accumulated other comprehensive (loss)	(14,344,000)	(11,795,000)
Treasury Stock, at cost; April 30 - 4,458,406 shares at cost; July 31 - 4,375,833 shares at cost	(52,456,000)	(46,069,000)
Total stockholders' equity	503,877,000	454,370,000
Total liabilities and stockholders' equity	$ 784,382,000	$ 694,532,000

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.