Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2016	Jul. 31, 2015
Cash flows from operating activities:
Net income	$ 9,163	$ 3,011
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment	6,382	7,279
Accretion and amortization of debt discount and deferred financing fees	6,129	854
Amortization of intangible assets	9,413	8,792
Provision for losses on accounts and notes receivable	(75)	(1)
Provision for obsolescence of inventory	23	43
Equity-based compensation	627	1,172
Net gain on sale or impairment of assets	(199)	(25)
Deferred income tax benefit	(3,222)	(4,091)
Prepaid expenses and other assets	(3,058)	(4,144)
Accrued compensation and employee benefits	(24,947)	(26,880)
Other accrued expenses and liabilities	852	11,429
Liabilities to noncontrolling interest holders	246	473
Income taxes	2,835	2,457
Total net income and adjustments	4,169	369
Changes in primary working capital components, net of acquisitions:
Trade accounts and notes receivable	(19,360)	(21,834)
Inventories	(17,101)	377
Accounts payable	1,672	2,677
Cash used in operating activities	(30,620)	(18,411)
Cash flows from investing activities:
Purchases of property and equipment	(2,607)	(1,465)
Proceeds from sale of assets	841	430
Acquisition of businesses, net of cash acquired	(23,278)
Cash used in investing activities	(25,044)	(1,035)
Cash flows from financing activities:
Repayments on the revolving credit facility	(225,702)	(136,243)
Borrowings from the revolving credit facility	280,397	161,089
Payments of principal on long-term debt	(975)	(975)
Principal repayments of capital lease obligations	(1,213)	(1,032)
Proceeds from issuance of common stock in initial public offering, net of offering costs	157,217
Repayment of term loan	(160,000)
Stock repurchases		(5,827)
Exercise of stock options		3,317
Payments of contingent considerations	(3,304)
Cash provided by financing activities	46,420	20,329
(Decrease) increase in cash and cash equivalents	(9,244)	883
Balance, beginning of period	19,072	12,284
Balance, end of period	9,828	13,167
Supplemental cash flow disclosures:
Cash paid for income taxes	6,540	4,515
Cash paid for interest	6,613	7,943
Supplemental schedule of noncash activities:
Assets acquired under capital lease	3,824	2,283
Change in fair value of derivative instrument	(205)	(282)
Increase (decrease) increase in insurance claims payable and insurance recoverable	$ 161	$ (26,000)