CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Net income	$ 11,376	$ 34,766	$ 33,483
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	23,754	12,698	11,849
Amortization of debt issuance costs and debt discount	5,847	3,496
Amortization of deferred financing costs	570
Provision for doubtful accounts	(3)	76	484
Non-cash stock compensation	6,956	6,719	4,537
Deferred income taxes	(504)	(18)	(1,874)
Earnings on equity investment in joint venture	(2,336)	(2,060)	(1,761)
Contingent consideration		(1,074)	(3,468)
Amortization of inventory step-up	4,502
Environmental remediation charge	903	1,313	1,618
Changes in assets and liabilities:
Trade accounts receivable	(17,598)	(6,149)	(44,181)
Other receivables	185	136	(5,644)
Inventory	(2,958)	(2,489)	(229)
Prepaid expenses and other current assets	1,209	(243)	304
Other assets	(157)	(557)	1,254
Accounts payable	(3,097)	(8,937)	8,133
Accrued expenses and other liabilities	14,010	(7,689)	1,816
Distributions from joint venture	1,908	1,843	2,022
Net cash provided by operating activities	44,567	31,831	8,343
Investing activities:
Payment for net assets acquired	(270,000)
Purchases of investments	(2,035)	(34)	(2,720)
Sales of investments	909	2,517
Payments for intangible assets	(3,359)	(11,249)	(1,564)
Purchases of property and equipment, net	(1,893)	(1,128)	(617)
Net cash used in investing activities	(276,378)	(9,894)	(4,901)
Financing activities:
Proceeds from exercise of stock options	551	729	1,273
Excess income tax benefit on stock option exercises and restricted stock	546	1,219	790
Payment of cash dividends	(7,831)	(7,084)	(6,964)
Payment of deferred consideration			(3,500)
Payment of contingent consideration		(1,500)	(4,500)
Proceeds from convertible senior notes		143,750
Payment for debt issuance costs		(5,153)
Proceeds from sold warrants		13,685
Purchase of call option (hedge)		(27,174)
Termination payment for interest rate swap		(420)
Borrowings of bank loans	275,000	15,500	19,000
Payment for deferred financing costs	(5,407)
Repayment of bank loans	(42,697)	(122,697)	(14,344)
Net cash provided by (used in) financing activities	220,162	10,855	(8,245)
Effect of foreign exchange rate changes on cash	501	16	(4,074)
Net (decrease) increase in cash and cash equivalents	(11,148)	32,808	(8,877)
Cash and cash equivalents at beginning of period	66,828	34,020	42,897
Cash and cash equivalents at end of period	$ 55,680	$ 66,828	$ 34,020