Termination Benefits and Other Cost Reduction Actions - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 3,700	$ 5,022	$ 6,455	$ 10,645
Non cash portion of net costs related to abandoned assets			500
Cost of Revenue [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1,600	700	2,900	1,300
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 2,100	$ 4,300	$ 3,500	$ 9,300