Goodwill and Other Intangible Assets - Amortization of Intangibles (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense	$ 8,402	$ 5,227	$ 1,750
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2014 expected amortization	7,945
2015 expected amortization	7,730
2016 expected amortization	7,468
2017 expected amortization	6,296
2018 expected amortization	5,481
Expected amortization thereafter	12,277
Total expected amortization expense	47,197	51,499
Asset impairment charges	0	0	1,434
Patents, trademarks and other [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense	3,553	1,993	1,342
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2014 expected amortization	3,234
2015 expected amortization	3,019
2016 expected amortization	2,757
2017 expected amortization	2,214
2018 expected amortization	1,646
Expected amortization thereafter	2,161
Total expected amortization expense	15,031	16,304
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense	2,376	1,168	3
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2014 expected amortization	2,420
2015 expected amortization	2,420
2016 expected amortization	2,420
2017 expected amortization	2,072
2018 expected amortization	1,988
Expected amortization thereafter	6,783
Total expected amortization expense	18,103	19,134
Developed technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, amortization expense	2,327	1,716	55
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2014 expected amortization	2,291
2015 expected amortization	2,291
2016 expected amortization	2,291
2017 expected amortization	2,010
2018 expected amortization	1,847
Expected amortization thereafter	3,333
Total expected amortization expense	14,063	15,915
Note issuance costs [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	7 years
Finite-lived intangible assets, amortization expense	146	350	350
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
Total expected amortization expense	$ 0	$ 146
Minimum [Member] | Patents, trademarks and other [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	2 years
Minimum [Member] | Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	5 years
Minimum [Member] | Developed technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	5 years 6 months
Maximum [Member] | Patents, trademarks and other [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	15 years
Maximum [Member] | Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	10 years
Maximum [Member] | Developed technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, useful life	10 years