Commitments and Contingencies (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Potential Earn Out, Year 1 and 2	$ 6,000
Potential Earnout, Years Three and Four	8,000
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	20,000
Unrecorded Unconditional Purchase Obligation	84,600
Business Combination, Contingent Consideration, Liability	$ 0	$ 12,200
Business Combination, Contingent Consideration, Liability, Current		0
Business Combination, Contingent Consideration, Liability, Noncurrent		12,200
business combination contingent consideration fair value non-current		$ 0	$ (1,800)