CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities:
Net income	$ 27,992	$ 19,847
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9,476	8,940
Amortization of debt issuance costs and debt discount	2,084
Provision for doubtful accounts	(17)	316
Non-cash stock compensation	4,965	3,407
Deferred income taxes	(289)	(1,000)
Contingent consideration	(1,074)
Earnings on equity investment in joint venture	(1,849)	(1,767)
Changes in assets and liabilities:
Trade accounts receivable	(14,595)	(33,084)
Other receivables	(1,259)	(3,616)
Inventory	(4,120)	(2,695)
Prepaid expenses and other current assets	(605)	649
Other assets	424	1,261
Accounts payable	5,604	9,467
Accrued expenses and other liabilities	(9,714)	4,831
Net cash provided by operating activities	17,023	6,556
Investing activities:
Purchases of investments	(19)	(1,120)
Sales of investments	1,006
Payments for intangible assets	(10,951)	(1,510)
Purchases of property and equipment, net	(878)	(581)
Net cash used in investing activities	(10,842)	(3,211)
Financing activities:
Payment of cash dividends	(5,351)	(5,232)
Proceeds from exercise of stock options	653	1,039
Excess tax benefit on stock option exercises and restricted stock	1,169	670
Payment of contingent consideration	(1,500)	(3,000)
Payment of deferred consideration		(3,500)
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	14,000
Repayment of bank loans	(122,648)	(12,294)
Net cash provided by (used in) financing activities	12,511	(8,317)
Effect of exchange rate changes on cash	381	(4,216)
Net increase (decrease) in cash	19,073	(9,188)
Cash and cash equivalents at beginning of period	34,020	42,897
Cash and cash equivalents at end of period	$ 53,093	$ 33,709