Estimated Fair Values of Assets Acquired and Liabilities Assumed for Armor Inox Acquisition (Details) (Armor Inox, USD $) In Thousands, unless otherwise specified	Dec. 21, 2011
Business Acquisition [Line Items]
Cash	$ 18,201
Current assets	13,654
Property, plant and equipment	1,571
Goodwill	26,135
Other intangibles	9,420
Other assets	25
Current liabilities	(18,626)
Long-term deferred tax liability	(3,072)
Other non-current liabilities	(450)
Net assets acquired and liabilities assumed	46,858
as initially reported
Business Acquisition [Line Items]
Cash	18,201
Current assets	14,612
Property, plant and equipment	941
Goodwill	23,789
Other intangibles	12,155
Other assets	25
Current liabilities	(18,440)
Long-term deferred tax liability	(3,975)
Other non-current liabilities	(450)
Net assets acquired and liabilities assumed	46,858
Measurement Period Adjustments
Business Acquisition [Line Items]
Cash	0
Current assets	(958)
Property, plant and equipment	630
Goodwill	2,346
Other intangibles	(2,735)
Other assets	0
Current liabilities	(186)
Long-term deferred tax liability	903
Other non-current liabilities	0
Net assets acquired and liabilities assumed	$ 0