CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2015
Cash flows from operating activities
Net income	$ 71,378	$ 59,953	$ 47,953
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	15,045	11,989	10,692
Amortization	18,407	13,095	13,265
Stock-based compensation expense	8,844	8,361	5,867
Amortization of debt issuance costs	401	401	401
Loss on disposal of fixed assets	966	553	360
Loss on sale of business	0	0	2,206
Impairment of assets	0	0	1,287
Fair value adjustments to acquisition related liabilities	(265)	(687)	(2,585)
Deferred income taxes	118	(1,710)	(1,449)
Excess tax benefits from stock-based compensation	0	(1,179)	(3,168)
Changes in assets and liabilities, net of effects of business acquisitions/divestiture:
Accounts receivable	(12,860)	(12,729)	(3,905)
Inventories	887	(15,558)	(10,075)
Prepaid expenses and other current assets	(1,005)	(2,850)	(2,996)
Accounts payable and other current liabilities	7,039	17,657	(3,347)
Income taxes	(895)	2,972	4,564
Other assets and liabilities	133	0	0
Net cash provided by operating activities	108,193	80,268	59,070
Cash flows from investing activities
Capital expenditures	(27,065)	(18,889)	(12,760)
Proceeds from disposal of fixed assets	47	96	25
Proceeds from sale of business, net of cash retained and disposal costs	0	0	3,767
Acquisition of businesses, net of cash acquired	(70,044)	(94,528)	(43,567)
Other, net	0	339	241
Net cash used in investing activities	(97,062)	(112,982)	(52,294)
Cash flows from financing activities
Borrowings under revolving credit facility	74,000	96,500	47,000
Repayments under revolving credit facility	(64,000)	(59,000)	(49,000)
Proceeds from exercises of stock options	0	0	608
Dividends paid	(5,841)	(5,005)	(4,154)
Excess tax benefits from stock-based compensation	0	1,179	3,168
Purchases of treasury stock	(6,910)	(3,732)	(3,727)
Net cash (used in) provided by financing activities	(2,751)	29,942	(6,105)
Effect of exchange rate changes on cash and cash equivalents	(163)	(581)	(732)
Increase (decrease) in cash and cash equivalents	8,217	(3,353)	(61)
Cash and cash equivalents at beginning of period	28,367	31,720	31,781
Cash and cash equivalents at end of period	36,584	28,367	31,720
Supplemental disclosures of cash flow information:
Cash interest payments	3,455	3,001	1,970
Cash income tax payments	$ 35,858	$ 33,559	$ 25,239