Segment Information - Financial Performance of Reporting Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 176,737	$ 125,234	$ 520,648	$ 354,243
Cost of revenues	95,229	61,531	281,178	171,393
Gross profit	81,508	63,703	239,470	182,850
Operating expenses	76,580	49,844	232,808	146,188
Income from operations	4,928	13,859	6,662	36,662
Revenues	176,737	125,234	520,648	354,243
Property and equipment, net	41,034		41,034		$ 32,309
United States
Segment Reporting Information [Line Items]
Revenues	155,989	103,944	445,470	297,564
Property and equipment, net	36,017		36,017		29,506
Rest of world
Segment Reporting Information [Line Items]
Revenues	20,748	21,290	75,178	56,679
Property and equipment, net	5,017		5,017		$ 2,803
Operating segments
Segment Reporting Information [Line Items]
Revenues	176,737	125,234	520,648	354,243
Cost of revenues	95,229	61,531	281,178	171,393
Gross profit	81,508	63,703	239,470	182,850
Operating expenses	55,260	36,698	168,626	103,516
Income from operations	26,248	27,005	70,844	79,334
Operating segments | Automation and Analytics
Segment Reporting Information [Line Items]
Revenues	152,437	102,967	450,043	284,447
Cost of revenues	77,828	45,668	233,401	123,923
Gross profit	74,609	57,299	216,642	160,524
Operating expenses	49,123	30,628	151,108	85,195
Income from operations	25,486	26,671	65,534	75,329
Operating segments | Medication Adherence
Segment Reporting Information [Line Items]
Revenues	24,300	22,267	70,605	69,796
Cost of revenues	17,401	15,863	47,777	47,470
Gross profit	6,899	6,404	22,828	22,326
Operating expenses	6,137	6,070	17,518	18,321
Income from operations	762	334	5,310	4,005
Corporate cost
Segment Reporting Information [Line Items]
Operating expenses	$ 21,320	$ 13,146	$ 64,182	$ 42,672