Acquired Intangible Assets Amortization (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Oct. 27, 2016
Business Acquisition [Line Items]
Intangible assets	$ 409,500
HealthMEDX, LLC [Member]
Business Acquisition [Line Items]
Intangible assets	20,940	$ 20,940
Corporate Trademark [member]
Business Acquisition [Line Items]
Indefinite intangible assets, fair value	$ 27,000
Technology [member]
Business Acquisition [Line Items]
Intangible assets, useful life (in years)	10 years
Intangible assets, fair value	$ 144,000
Technology [member] | HealthMEDX, LLC [Member]
Business Acquisition [Line Items]
Intangible assets, useful life (in years)	10 years
Intangible assets, fair value	$ 11,410
Product Trademarks [Member]
Business Acquisition [Line Items]
Intangible assets, useful life (in years)	10 years
Intangible assets, fair value	$ 8,500
Product Trademarks [Member] | HealthMEDX, LLC [Member]
Business Acquisition [Line Items]
Intangible assets, useful life (in years)	10 years
Intangible assets, fair value	$ 680
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible assets, fair value	$ 230,000
Customer Relationships [Member] | HealthMEDX, LLC [Member]
Business Acquisition [Line Items]
Intangible assets, useful life (in years)	15 years
Intangible assets, fair value	$ 8,850
Customer Relationships [Member] | Minimum [Member]
Business Acquisition [Line Items]
Intangible assets, useful life (in years)	12 years
Customer Relationships [Member] | Maximum [Member]
Business Acquisition [Line Items]
Intangible assets, useful life (in years)	20 years