Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2016
Cash flows from operating activities
Net income	$ 91,041	$ 71,378	$ 59,953
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	17,473	15,045	11,989
Amortization	17,357	18,407	13,095
Stock-based compensation expense	9,615	8,844	8,361
Deferred income taxes	(7,520)	118	(1,710)
Excess tax benefits from stock-based compensation			(1,179)
Other non-cash items, net	1,076	1,102	267
Changes in assets and liabilities, net of effects of business acquisitions/divestitures:
Accounts receivable	(3,700)	(12,860)	(12,729)
Inventories	(3,785)	887	(15,558)
Prepaid expenses and other assets	(5,169)	(957)	(2,850)
Accounts payable and other liabilities	10,614	7,124	17,657
Income taxes	(1,090)	(895)	2,972
Net cash provided by operating activities	125,912	108,193	80,268
Cash flows from investing activities
Capital expenditures	(37,698)	(27,065)	(18,889)
Proceeds from disposal of fixed assets	0	47	96
Acquisition of businesses, net of cash acquired	(87,488)	(70,044)	(94,528)
Other, net	0	0	339
Net cash used in investing activities	(125,186)	(97,062)	(112,982)
Cash flows from financing activities
Proceeds from issuance of long-term debt	200,000	0	0
Borrowings under revolving credit facility	82,300	74,000	96,500
Repayments under revolving credit facility	(208,300)	(64,000)	(59,000)
Debt issuance costs	(2,698)	0	0
Dividends paid	(7,091)	(5,841)	(5,005)
Excess tax benefits from stock-based compensation			1,179
Purchases of treasury stock	(7,074)	(6,910)	(3,732)
Net cash provided by (used in) financing activities	57,137	(2,751)	29,942
Effect of exchange rate changes on cash and cash equivalents	(350)	(163)	(581)
Increase (decrease) in cash and cash equivalents	57,513	8,217	(3,353)
Cash and cash equivalents at beginning of period	36,584	28,367	31,720
Cash and cash equivalents at end of period	94,097	36,584	28,367
Supplemental disclosures of cash flow information:
Cash interest payments	5,156	3,455	3,001
Cash income tax payments	35,251	35,858	33,559
Accruals related to purchases of property and equipment	$ 2,281	$ 192	$ 0