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Segments - Reconciliation of Operationg Profit (Loss) from Segments to Consolidated (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
segment
Jun. 30, 2013
Segment Reporting Information [Line Items]        
Number of Reportable Segments     2  
Revenues $ 105,052 $ 93,686 $ 206,816 $ 180,796
Cost of Revenue 49,012 44,318 96,281 86,061
Gross profit 56,040 49,368 110,535 94,735
Gross Margin Percentage 53.30% 52.70% 53.40% 52.40%
Operating Expenses 43,482 40,009 88,023 81,208
Operating Income (Loss) 12,558 9,359 22,512 13,527
Operating margin percentage 12.00% 10.00% 10.90% 7.50%
Interest and other income (expense), net (40) 63 (296) (159)
Income before provision for income taxes 12,518 9,422 22,216 13,368
Provision for income taxes 4,729 3,406 8,233 3,967
Net income 7,789 6,016 13,983 9,401
Medication Adherence
        
Segment Reporting Information [Line Items]        
Revenues 20,350 19,820 40,615 38,217
Cost of Revenue 13,020 12,382 25,349 23,849
Gross profit 7,330 7,438 15,266 14,368
Gross Margin Percentage 36.00% 37.50% 37.60% 37.60%
Operating Expenses 6,974 6,201 14,113 14,296
Operating Income (Loss) 356 1,237 1,153 72
Operating margin percentage 1.70% 6.20% 2.80% 0.20%
Automation and Analytics
        
Segment Reporting Information [Line Items]        
Revenues 84,702 73,866 166,201 142,579
Cost of Revenue 35,992 31,936 70,932 62,212
Gross profit 48,710 41,930 95,269 80,367
Gross Margin Percentage 57.50% 56.80% 57.30% 56.40%
Operating Expenses 36,508 33,808 73,910 66,912
Operating Income (Loss) $ 12,202 $ 8,122 $ 21,359 $ 13,455
Operating margin percentage 14.40% 11.00% 12.90% 9.40%