Debt (Narrative) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		0 Months Ended					0 Months Ended				1 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2012 Revolving Loans [Member]	Dec. 31, 2010 Revolving Loans [Member]	Jun. 30, 2012 Revolving Loans [Member]	Sep. 30, 2012 Revolving Loans [Member] Minimum [Member]	Sep. 30, 2012 Revolving Loans [Member] Maximum [Member]	Dec. 31, 2010 Term Loan [Member]	Sep. 30, 2012 Term Loan [Member] Installment	Jun. 30, 2012 Term Loan [Member]	Mar. 31, 2012 Term Loan [Member]	Jun. 30, 2011 Mortgage Payable [Member]
Debt Instrument [Line Items]
Revolving loans, maximum amount				$ 40,000				$ 40,000
Revolving loans, expiration date				Dec. 31, 2015
Proceeds from bank loans	4,000		15,000					40,000
Bank loans, interest rate						2.19%	3.25%		2.13%			5.92%
Bank loans outstanding			15,000		11,000				29,500	31,000
Term loans, number of installments									20
Short term loans payable	6,964	6,713									6,750
Open letters of credit	117	199
Mortgage payable	$ 3,717	$ 3,765										$ 3,947
Mortgage payable, amortization period												20 years
Mortgage payable, maturity date												Jun. 30, 2021