Business Combinations Business Combinations Purchase Price Allocation (Details) (USD $)	May 01, 2012
Schedule of Assets and Liabilities Acquired in a Business Combination [Line Items]
Current assets	$ 12,412,000	[1]
Property, plant and equipment	1,653,000
Intangible assets	43,400,000
Goodwill	46,881,000
Total assets acquired	104,346,000
Current liabilities	26,143,000
Long-term liabilities	465,000
Total liabilities assumed	26,608,000
Total net assets acquired	77,738,000
Fair value of accounts receivable acquired	6,100,000
Gross contractual value of accounts receivable acquired	$ 6,100,000

[1] Current assets include the fair value of accounts receivable of $6.1 million, which equals its contractual balance as it is considered fully collectible.