Acquisitions (Details 2) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2013
Customer Relationships [Member] | Emplal [Member]
Business Acquisition [Abstract]
Finite-lived Intangible Assets Acquired	$ 4.5
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Customer Relationships [Member] | NCS [Member]
Business Acquisition [Abstract]
Finite-lived Intangible Assets Acquired		$ 8.3
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		9 years
Contract based | NCS [Member]
Business Acquisition [Abstract]
Finite-lived Intangible Assets Acquired		$ 4.4
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		43 years
Other Intangible Assets [Member] | NCS [Member]
Business Acquisition [Abstract]
Finite-lived Intangible Assets Acquired		$ 0.4
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		2 years