Fair Value Measurements Schedule of Activity of Major Classes of Assets Measured at Fair Value Using Level 3 Inputs (Details) (Level 3, USD $) In Thousands, unless otherwise specified	12 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2012 Verivue	Dec. 31, 2013 Velocius
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance, Other Assets:Note Receivable	$ 0	$ 0
Beginning balance, Other Liabilities:Contingent Consideration Obligation	(1,200)	0
Contingent consideration obligation related to acquisition			(1,200)	(2,600)
Fair value adjustment to contingent consideration for acquisition of Verivue included in general and administrative expense	1,200
Convertible note receivable from divestiture of a business	18,882
Unrealized gain on convertible note receivable included in other comprehensive income	3,997
Ending balance, Other Assets:Note Receivable	22,879	0
Ending balance, Other Liabilities:Contingent Consideration Obligation	$ (2,600)	$ 0