Estimated Fair Values of Assets Acquired and Liabilities Assumed for Baker Acquisition (Details) (Baker, USD $) In Thousands, unless otherwise specified	Mar. 14, 2012
Business Acquisition [Line Items]
Current assets	$ 2,381
Property, plant and equipment	221
Goodwill	7,278
Other intangibles	750
Current liabilities	(380)
Net assets acquired and liabilities assumed	10,250
as initially reported
Business Acquisition [Line Items]
Current assets	4,617
Property, plant and equipment	221
Goodwill	5,797
Other intangibles	0
Current liabilities	(385)
Net assets acquired and liabilities assumed	10,250
Measurement Period Adjustments
Business Acquisition [Line Items]
Current assets	(2,236)
Property, plant and equipment	0
Goodwill	1,481
Other intangibles	750
Current liabilities	5
Net assets acquired and liabilities assumed	$ 0