Commitments and Contingencies - Narrative (Details) € in Millions	1 Months Ended							12 Months Ended			44 Months Ended
	Jan. 31, 2014 USD ($)	Jan. 31, 2014 EUR (€)	Dec. 31, 2013 USD ($)	Dec. 31, 2013 EUR (€)	Nov. 30, 2013 USD ($)	Nov. 30, 2013 EUR (€)	Dec. 31, 2010 patent	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2015 EUR (€)	Feb. 28, 2014 EUR (€)	Dec. 31, 2012 EUR (€)	Dec. 31, 2011 USD ($)	Dec. 31, 2011 EUR (€)
Commitments and Contingencies Disclosure [Abstract]
Rent expense								$ 11,400,000	$ 10,000,000	$ 9,100,000
Loss Contingencies [Line Items]
Contingent consideration								9,400,000				€ 7.1
Fixed consideration								8,000,000				5.8
Maximum consideration											$ 7,800,000			€ 5.9	$ 1,600,000	€ 1.2
e-Lynxx Lawsuit
Loss Contingencies [Line Items]
Number of patents | patent							2
e-Lynxx Lawsuit | Minimum
Loss Contingencies [Line Items]
Damages sought											35,000,000
e-Lynxx Lawsuit | Maximum
Loss Contingencies [Line Items]
Damages sought											$ 88,000,000
Employment Arbitration Claim
Loss Contingencies [Line Items]
Damages sought	$ 800,000	€ 0.6
Wrongful Termination Lawsuit - Productions Graphics
Loss Contingencies [Line Items]
Damages sought			$ 1,000,000	€ 0.7
Judicial asset attachment order					$ 1,000,000	€ 0.7
Contingent consideration								9,400,000				7.1	€ 7.1
Fixed consideration								8,000,000				5.8
Maximum consideration								$ 37,600,000				€ 34.5