Goodwill and Other Intangible Assets - Schedule of Finite-Lived Intangible Assets, Amortization Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Amortization of Intangible Assets [Line Items]
Amortization of intangible assets	$ 4,200	$ 5,270	$ 14,420	$ 14,460
Cost of Sales [Member] | Technology and Other [Member]
Amortization of Intangible Assets [Line Items]
Amortization of intangible assets	1,200	1,270	3,610	3,620
Selling, General and Administrative Expenses [Member] | Customer Relationships [Member]
Amortization of Intangible Assets [Line Items]
Amortization of intangible assets	$ 3,000	$ 4,000	$ 10,810	$ 10,840