Termination Benefits and Other Cost Reduction Actions - Summary of Real Estate Consolidations, Elimination of Redundant Functions and Employees Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring and Related Activities [Abstract]
Employee severance and related costs	$ 3,545	$ 4,893	$ 6,124	$ 6,971
Facilities-related costs	155	129	331	3,674
Total	$ 3,700	$ 5,022	$ 6,455	$ 10,645