Segment and Geographic Information - Narrative (Details)	12 Months Ended
	Dec. 31, 2016 Segment country
Segment Reporting [Abstract]
Number of reportable segments | Segment	3
Number of countries in which operations is carried on | country	95
Maximum percentage of consolidated revenue represented by foreign countries (more than)	8.00%
Maximum percentage of consolidated revenue represented by single customer (more than)	10.00%