Goodwill and Other Intangible Assets Finite life intangibles Gross and Net at balance sheet dates (Details) (USD $) In Thousands, unless otherwise specified							12 Months Ended					12 Months Ended			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Customer Relationships [Member]	Dec. 31, 2013 Customer Relationships [Member]	Mar. 31, 2014 acquired technology [Member]	Dec. 31, 2013 acquired technology [Member]	Dec. 31, 2012 Patents [Member]	Mar. 31, 2014 Patents [Member]	Dec. 31, 2013 Patents [Member]	Mar. 31, 2014 Trade Names [Member]	Dec. 31, 2013 Trade Names [Member]	Dec. 31, 2012 Noncompete Agreements [Member]	Mar. 31, 2014 Noncompete Agreements [Member]	Dec. 31, 2013 Noncompete Agreements [Member]	Mar. 31, 2014 Minimum [Member] Customer Relationships [Member]	Mar. 31, 2014 Minimum [Member] acquired technology [Member]	Mar. 31, 2014 Minimum [Member] Trade Names [Member]	Mar. 31, 2014 Maximum [Member] Customer Relationships [Member]	Mar. 31, 2014 Maximum [Member] acquired technology [Member]	Mar. 31, 2014 Maximum [Member] Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 90,761	$ 90,753	$ 54,730	$ 54,730	$ 27,580	$ 27,580		$ 1,561	$ 1,493	$ 6,890	$ 6,890		$ 0	$ 60
Finite-Lived Intangible Assets, Accumulated Amortization	10,188	9,151	5,775	5,236	2,965	2,598		303	254	1,145	1,003		0	60
Finite-Lived Intangible Assets, Net	$ 80,573	$ 81,602	$ 48,955	$ 49,494	$ 24,615	$ 24,982		$ 1,258	$ 1,239	$ 5,745	$ 5,887		$ 0	$ 0
Finite-Lived Intangible Asset, Useful Life							20 years					3 years			5 years	3 years	3 years	30 years	20 years	12 years