Schedule of Fair Value Assigned To Assets Acquired And Liabilities Assumed (Detail) (Westerman, Inc, USD $) In Thousands, unless otherwise specified	Sep. 17, 2012
Westerman, Inc
Business Acquisition [Line Items]
Cash and cash equivalents	$ 639
Accounts receivable	6,355
Inventories	15,377
Prepaid expenses and other current assets	836
Intangible assets	18,318
Property, plant and equipment	23,503
Total identifiable assets	65,028
Accounts payable	(2,952)
Accrued liabilities	(2,479)
Other current liabilities	(765)
Short-term borrowings	(7,251)
Deferred income taxes	(11,054)
Net identifiable assets	40,527
Goodwill	22,222
Total cash consideration	$ 62,749