CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating activities:
Net income	$ 9,409	$ 27,992
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	15,301	9,476
Amortization of debt issuance costs and debt discount	4,355	2,084
Amortization of deferred financing costs	300
Provision for doubtful accounts	(18)	(17)
Non-cash stock compensation	5,239	4,965
Deferred income taxes	627	(289)
Environmental remediation charge	903
Contingent consideration		(1,074)
Earnings on equity investment in joint venture	(1,558)	(1,849)
Changes in assets and liabilities:
Trade accounts receivable	(14,839)	(14,595)
Other receivables	1,664	(1,259)
Inventory	(3,778)	(4,120)
Prepaid expenses and other current assets	(424)	(605)
Other assets	215	424
Accounts payable	18,857	5,604
Accrued expenses and other liabilities	(4,702)	(9,714)
Net cash provided by operating activities	31,551	17,023
Investing activities:
Payment for net assets of businesses acquired	(270,000)
Purchases of investments	(1,824)	(19)
Sales of investments	775	1,006
Payments for intangible assets	(3,077)	(10,951)
Purchases of property and equipment, net	(1,386)	(878)
Net cash used in investing activities	(275,512)	(10,842)
Financing activities:
Payment of cash dividends	(5,944)	(5,351)
Proceeds from exercise of stock options	550	653
Excess tax benefit on stock option exercises and restricted stock	551	1,169
Payment of contingent consideration		(1,500)
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	265,000	15,500
Payment for deferred financing costs	(5,407)
Repayment of bank loans	(16,898)	(122,648)
Net cash provided by financing activities	237,852	12,511
Effect of exchange rate changes on cash	(757)	381
Net (decrease) increase in cash	(6,866)	19,073
Cash and cash equivalents at beginning of period	66,828	34,020
Cash and cash equivalents at end of period	$ 59,962	$ 53,093