Goodwill and Other Intangible Assets (Details 2) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Detail of other intangible assets for the periods
Finite lived intangible assets, gross carrying amounts	$ 58,336	$ 47,314
Finite lived intangible assets, accumulated amortization	(20,052)	(14,534)
Finite lived intangible assets, net carrying amount	38,145
Finite lived intangible assets, weighted average remaining life	3 years 6 months	4 years 1 month 6 days
Net carrying amount of definite and indefinite intangible assets	38,284	32,780
Developed technology
Detail of other intangible assets for the periods
Finite lived intangible assets, gross carrying amounts	37,452	30,952
Finite lived intangible assets, accumulated amortization	(11,266)	(7,676)
Finite lived intangible assets, net carrying amount	26,186	23,276
Finite lived intangible assets, weighted average remaining life	2 years 8 months 12 days	3 years 2 months 12 days
Trade name
Detail of other intangible assets for the periods
Finite lived intangible assets, gross carrying amounts	7,000	4,300
Finite lived intangible assets, accumulated amortization	(1,703)	(836)
Finite lived intangible assets, net carrying amount	5,297	3,464
Finite lived intangible assets, weighted average remaining life	2 years 4 months 24 days	2 years 4 months 24 days
Patents
Detail of other intangible assets for the periods
Finite lived intangible assets, gross carrying amounts	4,025	4,025
Finite lived intangible assets, accumulated amortization	(870)	(750)
Finite lived intangible assets, net carrying amount	3,155	3,275
Finite lived intangible assets, weighted average remaining life	13 years	13 years 6 months
Non-compete agreements
Detail of other intangible assets for the periods
Finite lived intangible assets, gross carrying amounts	2,661	2,661
Finite lived intangible assets, accumulated amortization	(2,238)	(1,717)
Finite lived intangible assets, net carrying amount	423	944
Finite lived intangible assets, weighted average remaining life	0 years 10 months 24 days	1 year 1 month 6 days
Customer relationships
Detail of other intangible assets for the periods
Finite lived intangible assets, gross carrying amounts	1,200	1,200
Finite lived intangible assets, accumulated amortization	(260)	(140)
Finite lived intangible assets, net carrying amount	940	1,060
Finite lived intangible assets, weighted average remaining life	3 years 10 months 24 days	4 years 4 months 24 days
Other intangible assets
Detail of other intangible assets for the periods
Finite lived intangible assets, gross carrying amounts	5,998	4,176
Finite lived intangible assets, accumulated amortization	(3,715)	(3,415)
Finite lived intangible assets, net carrying amount	$ 2,283	$ 761
Finite lived intangible assets, weighted average remaining life	2 years 1 month 6 days	2 years 4 months 24 days