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Note 8 - Leases (Detail) - Summary of Rental Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Rental expense	$ 24,139	$ 19,442	$ 21,995
Equipment [Member]
Rental expense	19,746	15,364	17,346
Land and Building [Member]
Rental expense	3,714	3,266	3,586
Other Machinery and Equipment [Member]
Rental expense	$ 679	$ 812	$ 1,063

X

- Definition

Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration