Restructuring, Asset Impairment, and Transition Expenses - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 9,849	$ 7,214	$ 1,767
Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring cost remaining	1,000
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Expected restructuring cost remaining	3,500
Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	2,700	5,200
Consolidation costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	1,700
Building impairments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	900	$ 2,000
Moving and relocation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	2,800
Other restructuring costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring costs	$ 1,700