Other Income (Loss) - Additional Information (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2014 contingent_consideration_obligation
Schedule Of Other Nonoperating Income Expense [Line Items]
Number of contingent consideration obligations | contingent_consideration_obligation				3
Payment for contingent consideration obligations		$ 1,870	$ 0
Anthem
Schedule Of Other Nonoperating Income Expense [Line Items]
Proceeds from sales / distributions of ownership interests		1,000
Acquirgy
Schedule Of Other Nonoperating Income Expense [Line Items]
Loan repayment from equity / cost method investment		$ 400
StarCite
Schedule Of Other Nonoperating Income Expense [Line Items]
Proceeds from sales / distributions of ownership interests			300
Other income (loss), net | WhiteFence
Schedule Of Other Nonoperating Income Expense [Line Items]
Gain on disposition of business	$ 500		$ 500