Restructuring and Integration Costs (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Restructuring Cost And Reserve [Line Items]
Restructuring costs	$ 8,000	$ 21,000
Restructuring Reserve [Roll Forward]
Beginning Balance	13,477	6,404
Additions	8,014	21,090
Cash payments	(8,772)	(14,017)
Ending Balance	12,719	13,477
Other Current Liabilities
Restructuring Reserve [Roll Forward]
Beginning Balance	9,398
Ending Balance		9,398
Other Liabilities
Restructuring Reserve [Roll Forward]
Beginning Balance	4,079
Ending Balance	3,641	4,079
Current Liabilities
Restructuring Reserve [Roll Forward]
Ending Balance	9,078
Severance and Related Costs
Restructuring Reserve [Roll Forward]
Beginning Balance	4,006	368
Additions	8,014	14,614
Cash payments	(4,864)	(10,976)
Ending Balance	7,156	4,006
Severance and Related Costs | Other Current Liabilities
Restructuring Reserve [Roll Forward]
Beginning Balance	4,006
Ending Balance		4,006
Severance and Related Costs | Other Liabilities
Restructuring Reserve [Roll Forward]
Beginning Balance	0
Ending Balance	0	0
Severance and Related Costs | Current Liabilities
Restructuring Reserve [Roll Forward]
Ending Balance	7,156
Other Restructuring Costs
Restructuring Reserve [Roll Forward]
Beginning Balance	9,471	6,036
Additions	0	6,476
Cash payments	(3,908)	(3,041)
Ending Balance	5,563	9,471
Other Restructuring Costs | Other Current Liabilities
Restructuring Reserve [Roll Forward]
Beginning Balance	5,392
Ending Balance		5,392
Other Restructuring Costs | Other Liabilities
Restructuring Reserve [Roll Forward]
Beginning Balance	4,079
Ending Balance	3,641	$ 4,079
Other Restructuring Costs | Current Liabilities
Restructuring Reserve [Roll Forward]
Ending Balance	$ 1,922