Segment Information - Financial Performance of Reporting Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues	$ 484,559	$ 440,900	$ 380,585
Cost of revenues	236,629	207,040	177,186
Gross profit	247,930	233,860	203,399
Operating expenses	199,298	184,277	168,100
Income from operations	48,632	49,583	35,299
Operating Segments
Segment Reporting Information [Line Items]
Revenues	484,559	440,900	380,585
Cost of revenues	236,629	207,040	177,186
Gross profit	247,930	233,860	203,399
Operating expenses	138,342	126,515	154,992
Income from operations	109,588	107,345	48,407
Operating Segments | Automation and Analytics
Segment Reporting Information [Line Items]
Revenues	390,321	354,095	302,917
Cost of revenues	171,943	151,327	129,314
Gross profit	218,378	202,768	173,603
Operating expenses	114,084	105,929	140,087
Income from operations	104,294	96,839	33,516
Operating Segments | Medication Adherence
Segment Reporting Information [Line Items]
Revenues	94,238	86,805	77,668
Cost of revenues	64,686	55,713	47,872
Gross profit	29,552	31,092	29,796
Operating expenses	24,258	20,586	14,905
Income from operations	5,294	10,506	14,891
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Operating expenses	$ 60,956	$ 57,762	$ 13,108