Goodwill and Other Intangible Assets - Schedule of Finite-Lived Intangible Assets, Amortization Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Amortization of Intangible Assets [Line Items]
Amortization of intangible assets	$ 5,150	$ 4,980	$ 10,230	$ 9,180
Cost of Sales [Member] | Technology and Other [Member]
Amortization of Intangible Assets [Line Items]
Amortization of intangible assets	1,210	1,270	2,410	2,340
Selling, General and Administrative Expenses [Member] | Customer Relationships [Member]
Amortization of Intangible Assets [Line Items]
Amortization of intangible assets	$ 3,940	$ 3,710	$ 7,820	$ 6,840