Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2019	Jul. 31, 2018
Cash flows from operating activities:
Net income	$ 24,820	$ 8,650
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	29,275	26,322
Write-off and amortization of debt discount and debt issuance costs	835	825
Provision for losses on accounts and notes receivable	657	148
Provision for obsolescence of inventory	119	(22)
Effects of fair value adjustments to inventory	151	4,129
Increase in fair value of contingent consideration	228	229
Equity-based compensation	2,071	1,269
Gain on sale and disposal of assets	(156)	(121)
Change in fair value of financial instruments		6,019
Deferred income taxes	(1,440)	(571)
Changes in assets and liabilities net of effects of acquisitions:
Trade accounts and notes receivable	(23,230)	(40,974)
Inventories	18	(20,943)
Prepaid expenses and other assets	(1,359)	416
Accounts payable	(9,526)	(1,696)
Accrued compensation and employee benefits	(26,347)	(22,945)
Derivative liability		(10,778)
Other accrued expenses and liabilities	(8,556)	2,219
Cash used in operating activities	(12,440)	(47,824)
Cash flows from investing activities:
Purchases of property and equipment	(5,891)	(3,793)
Proceeds from sale of assets	232	266
Acquisition of businesses, net of cash acquired	(10,633)	(575,499)
Cash used in investing activities	(16,292)	(579,026)
Cash flows from financing activities:
Repayments on the revolving credit facility	(262,107)	(176,769)
Borrowings from the revolving credit facility	274,810	392,170
Payments of principal on long-term debt	(2,492)	(2,492)
Payments of principal on finance lease obligations	(6,021)	(3,998)
Borrowings from term loan		996,840
Repayments from term loan		(571,840)
Debt issuance costs		(7,933)
Proceeds from exercises of stock options	133	431
Other financing activities	1,022	873
Cash provided by financing activities	5,345	627,282
Effect of exchange rates on cash and cash equivalents	172	(4)
(Decrease) increase in cash and cash equivalents	(23,215)	428
Cash and cash equivalents, beginning of period	47,338	36,437
Cash and cash equivalents, end of period	24,123	36,865
Supplemental cash flow disclosures:
Cash paid for income taxes	18,776	958
Cash paid for interest	$ 17,011	$ 10,980