Description of Business and Summary of Significant Accounting Policies (Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified					12 Months Ended				12 Months Ended				12 Months Ended				12 Months Ended					12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Customer Relationships [Member]	Dec. 31, 2012 Customer Relationships [Member]	Dec. 31, 2013 Customer Relationships [Member] Minimum [Member]	Dec. 31, 2013 Customer Relationships [Member] Maximum [Member]	Dec. 31, 2013 Developed Technology [Member]	Dec. 31, 2012 Developed Technology [Member]	Dec. 31, 2013 Developed Technology [Member] Minimum [Member]	Dec. 31, 2013 Developed Technology [Member] Maximum [Member]	Dec. 31, 2013 Trademarks [Member]	Dec. 31, 2012 Trademarks [Member]	Dec. 31, 2013 Trademarks [Member] Minimum [Member]	Dec. 31, 2013 Trademarks [Member] Maximum [Member]	Dec. 31, 2013 Noncompete Agreements [Member]	Dec. 31, 2012 Noncompete Agreements [Member]	Dec. 31, 2013 Noncompete Agreements [Member] Maximum [Member]	Dec. 31, 2013 Backlog [Member]	Dec. 31, 2012 Backlog [Member]	Dec. 31, 2013 Database [Member]	Dec. 31, 2012 Database [Member]	Dec. 31, 2013 Database [Member] Maximum [Member]	Dec. 31, 2013 Customer/Territorial Relationships [Member]	Dec. 31, 2012 Customer/Territorial Relationships [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line items]
Finite-Lived Intangible Assets, Gross	$ 80,574	$ 75,191	$ 62,408	$ 57,638			$ 14,630	$ 14,025			$ 2,646	$ 2,638			$ 538	$ 538		$ 140	$ 140	$ 212	$ 212
Finite-lived intangible assets, accumulated amortization	(29,840)	(22,600)
Finite-lived intangible assets, net	50,734	52,591
Indefinite-lived intangible assets																							$ 30,887	$ 30,887
Finite-lived intangible asset, useful life					7 years	20 years			3 years	12 years			3 years	15 years			5 years					10 years