Intangible Assets and Goodwill (Details 3) (USD $)	12 Months Ended					12 Months Ended				1 Months Ended	12 Months Ended			3 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Existing technology	Dec. 31, 2012 Existing technology	Dec. 31, 2013 Favorable contracts.	Dec. 31, 2012 Favorable contracts.	Dec. 31, 2013 Non-competition agreements	Dec. 31, 2012 Non-competition agreements	Jun. 30, 2011 Group of purchased intangible assets	Dec. 31, 2012 Other non-CRI related Patents	Dec. 31, 2013 Other non-CRI related Patents	Dec. 31, 2011 Other non-CRI related Patents	Dec. 31, 2013 LDT	Sep. 30, 2012 LDT	Dec. 31, 2012 LDT
Identified intangible assets assumed in the acquisition of CRI
Impairment charge														$ 4,000,000	$ 15,400,000	$ 15,400,000
Estimated Useful Life (in years)										7 years
Cash received related to intangible assets						2,300,000	5,100,000
Purchased patents
Patents Acquired											1,700,000	2,500,000	4,200,000
Cash paid in 2011 related to other non-CRI intangible assets											1,200,000
Amortization of intangible assets	28,909,000	30,345,000	20,191,000
Estimated future amortization expense of intangible assets
2014	27,487,000
2015	25,348,000
2016	24,356,000
2017	23,734,000
2018	10,827,000
Thereafter	5,420,000
Finite-lived intangible assets	$ 117,172,000	$ 153,173,000		$ 105,241,000	$ 134,575,000	$ 1,000,000	$ 4,800,000	$ 42,000	$ 142,000