CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Operating activities:
Net income	$ 34,766	$ 33,483	$ 29,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	12,698	11,849	8,091
Amortization of debt issuance costs and debt discount	3,496
Provision for doubtful accounts	76	484	8
Non-cash stock compensation	6,719	4,537	3,156
Deferred income taxes	(18)	(1,874)	(3,083)
Earnings on equity investment in joint venture	(2,060)	(1,761)	(2,024)
Contingent consideration	(1,074)	(3,468)
Environmental remediation charge	1,313	1,618
Changes in assets and liabilities:
Trade receivables	(6,149)	(44,181)	(19,400)
Other receivables	136	(5,644)	1,353
Inventory	(2,489)	(229)	(7,764)
Prepaid expenses and other current assets	(243)	304	(232)
Other assets	(557)	1,254	57
Accounts payable	(8,937)	8,133	5,216
Accrued expenses and other liabilities	(7,689)	1,816	8,868
Distributions from joint venture	1,843	2,022	1,810
Net cash provided by operating activities	31,831	8,343	25,056
Investing activities:
Payment for net assets of businesses acquired			(86,140)
Purchases of investments	(34)	(2,720)	(108)
Sales of investments	2,517		1,506
Payments for intangible assets	(11,249)	(1,564)	(746)
Purchases of property and equipment, net	(1,128)	(617)	(1,145)
Net cash used in investing activities	(9,894)	(4,901)	(86,633)
Financing activities:
Proceeds from exercise of stock options	729	1,273	3,655
Excess income tax benefit on stock option exercises and restricted stock	1,219	790	1,752
Payment of cash dividends	(7,084)	(6,964)	(6,806)
Payment of deferred consideration		(3,500)	(1,500)
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	15,500	19,000	114,145
Repayment of bank loans	(122,697)	(14,344)	(40,713)
Net cash provided by (used in) financing activities	10,855	(8,245)	70,533
Effect of foreign exchange rate changes on cash	16	(4,074)	710
Net increase (decrease) in cash and cash equivalents	32,808	(8,877)	9,666
Cash and cash equivalents at beginning of period	34,020	42,897	33,231
Cash and cash equivalents at end of period	$ 66,828	$ 34,020	$ 42,897