Organization and Summary of Significant Accounting Policies - Impact of Newly Adopted Standard Related to Revenue Recognition (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues	$ 204,267	$ 186,748	$ 575,559	$ 516,343
Gross profit	98,909	84,819	270,147	225,142
Selling, general, and administrative	65,609	56,208	196,831	180,070
Provision for income taxes	1,030	1,717	(3,936)	(9,341)
Net income (loss)	$ 13,628	$ 7,748	$ 22,936	$ (707)
Net income (loss) per share - basic (in dollars per share)	$ 0.35	$ 0.21	$ 0.59	$ (0.02)
Net income (loss) per share - diluted (in dollars per share)	$ 0.33	$ 0.20	$ 0.57	$ (0.02)
Accounts receivable and unbilled receivables, net	$ 206,225		$ 206,225		$ 190,046
Prepaid expenses	19,618		19,618		20,392
Prepaid commissions	40,441		40,441		41,432
Other long-term assets	68,948		68,948		49,316
Deferred revenues, net	87,777		87,777		78,774
Long-term deferred revenues	10,634		10,634		10,623
Long-term deferred tax liabilities	32,593		32,593		41,446
Stockholders’ equity	$ 619,239		$ 619,239		554,341
Automation and analytics
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues		$ 154,617		$ 425,371
Gross profit		74,877		196,154
Medication adherence
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues		32,131		90,972
Gross profit		9,942		28,988
As reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general, and administrative		58,725		186,818
Provision for income taxes		751		(11,232)
Net income (loss)		$ 6,231		$ (3,686)
Net income (loss) per share - basic (in dollars per share)		$ 0.17		$ (0.10)
Net income (loss) per share - diluted (in dollars per share)		$ 0.16		$ (0.10)
Accounts receivable and unbilled receivables, net					189,227
Prepaid expenses					36,060
Prepaid commissions					0
Other long-term assets					39,841
Deferred revenues, net					86,104
Long-term deferred revenues					17,244
Long-term deferred tax liabilities					28,579
Stockholders’ equity					517,199
As reported | Automation and analytics
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues		$ 154,651		$ 427,249
Gross profit		74,911		198,032
As reported | Medication adherence
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues		32,131		90,972
Gross profit		9,942		28,988
Adjustment | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Selling, general, and administrative		(2,517)		(6,748)
Provision for income taxes		966		1,891
Net income (loss)		$ 1,517		$ 2,979
Net income (loss) per share - basic (in dollars per share)		$ 0.04		$ 0.08
Net income (loss) per share - diluted (in dollars per share)		$ 0.04		$ 0.08
Accounts receivable and unbilled receivables, net					819
Prepaid expenses					(15,668)
Prepaid commissions					41,432
Other long-term assets					9,475
Deferred revenues, net					(7,330)
Long-term deferred revenues					(6,621)
Long-term deferred tax liabilities					12,867
Stockholders’ equity					$ 37,142
Adjustment | Accounting Standards Update 2014-09 | Automation and analytics
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues		$ (34)		$ (1,878)
Gross profit		(34)		(1,878)
Adjustment | Accounting Standards Update 2014-09 | Medication adherence
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues		0		0
Gross profit		$ 0		$ 0