Debt (Narrative) (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended		0 Months Ended			1 Months Ended	0 Months Ended
	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2010 Term Loan [Member]	Dec. 31, 2012 Term Loan [Member] Installment	Jun. 30, 2012 Term Loan [Member]	Jun. 30, 2011 Mortgage Payable [Member]	Dec. 31, 2012 Revolving Loans [Member]	Dec. 31, 2010 Revolving Loans [Member]	Jun. 30, 2012 Revolving Loans [Member]	Dec. 31, 2012 Revolving Loans [Member] Minimum [Member]	Dec. 31, 2012 Revolving Loans [Member] Maximum [Member]
Debt Instrument [Line Items]
Revolving loans, maximum amount			$ 40,000					$ 40,000
Revolving loans, expiration date								Dec. 31, 2015
Proceeds from bank loans	7,000		40,000				16,000
Bank loans, interest rate				2.06%		5.92%				2.06%	3.25%
Bank loans outstanding				28,000	31,000		16,000		11,000
Term loans, number of installments				20
Term loan classified as short-term	7,000
Open letters of credit	65	199
Mortgage payable	$ 3,651	$ 3,765				$ 3,947
Mortgage payable, amortization period						20 years
Mortgage payable, maturity date						Jun. 30, 2021