Condensed Consolidated Statements of Cash Flows (unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 11,700	$ 5,701
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	5,775	6,212
Gain on disposal of fixed assets	(557)
Amortization	973	1,437
Deferred income taxes	1,009	339
Equity-based compensation	2,975	2,869
Changes in operating assets and liabilities:
Receivables	(1,183)	2,071
Inventories	(1,228)	(4,400)
Prepaid expenses and other assets	(1,480)	(360)
Accounts payable	(1,804)	(3,159)
Accrued expenses	1,059	(2,326)
Customer advance payments	86	1,123
Other liabilities	(1,587)	731
Pension and postretirement benefit obligation	(376)	(52)
Net cash provided by operating activities	15,362	10,186
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(4,075)	(5,730)
Proceeds from sale of property, plant, and equipment	5,787
Maturities of held to maturity securities	11,679	6,791
Purchases of held to maturity securities		(7,295)
Net cash provided by (used in) investing activities	13,391	(6,234)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from long-term debt obligation	8,000
Payment on long-term debt obligation	(8,000)	(30,000)
Stock options exercised	1,718	4,261
Excess tax benefit	546	685
Purchase of treasury stock	(20,316)	(7,673)
Net cash used in financing activities	(18,052)	(32,727)
Effect of exchange rates on cash	87	286
Net increase (decrease) in cash and cash equivalents	10,788	(28,489)
Cash and cash equivalents, beginning of period	21,012	58,388
Cash and cash equivalents, end of period	31,800	29,899
Cash paid during the period for:
Interest	90	219
Income tax payments, net	$ 1,491	$ 1,490