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	13,737
Property, plant and equipment	1,430
Goodwill	24,175
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
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	(875)
Property, plant and equipment	489
Goodwill	386
Other intangibles	0
Other assets	0
Current liabilities	0
Long-term deferred tax liability	0
Other non-current liabilities	0
Net assets acquired and liabilities assumed	$ 0