Restructuring and Other Related Charges (Benefits) - Additional Information (Detail) (USD $)	3 Months Ended	6 Months Ended			3 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2013 SapientNitro [Member]	Jun. 30, 2013 Sapient Global Markets [Member]	Jun. 30, 2014 2014 - Restructuring Event [Member] Employees	Dec. 31, 2013 2013 - Restructuring Events [Member] Employees	Dec. 31, 2013 2013 - Restructuring Events [Member] SapientNitro [Member]	Dec. 31, 2013 2013 - Restructuring Events [Member] Sapient Global Markets [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge					$ 1,900,000	$ 2,000,000
Number of terminated employees					42	82
Restructuring charges	$ (31,000)	$ 1,983,000	$ 1,300,000	$ 500,000			$ 1,300,000	$ 500,000