Acquisitions (Provisional Fair Value Of The Net Assets Acquired) (Detail) (Whitehall Group [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Whitehall Group [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	$ 16,190
Accounts receivable	51,263
Inventories	30,700
Taxes	577
Prepaid expenses and other current assets	12,916
Property, plant and equipment	869
Intangibles assets	8,723
Equity method investments in affiliates	17,871
Total Assets	139,109
Trade accounts payable	38,887
Bank loans and overdraft facilities	27,835
Taxes	4,325
Deferred income taxes	13
Other accrued liabilities	12,811
Total Liabilities	83,871
Net identifiable assets and liabilities	$ 55,238