Reorganization - Additional Information (Detail) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($)	Mar. 31, 2015	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($) Employee
Restructuring Cost And Reserve [Line Items]
Percentage of workforce reduction		4.00%		1.00%	2.50%
Severance costs			$ 3,200	$ 1,800	$ 1,900
Reorganization costs			4,433	$ 1,817	$ 1,905
Number of additional employees terminated related to sales reorganization and other cost reduction initiatives | Employee					31
Subsidiary Liquidation [Member]
Restructuring Cost And Reserve [Line Items]
Reorganization costs			300
Products Group Reorganization [Member]
Restructuring Cost And Reserve [Line Items]
Severance costs	$ 700
Reorganization costs			$ 926
Expected severance and related benefit costs to be paid in 2016	500
Products Group Reorganization [Member] | Software Development Project [Member]
Restructuring Cost And Reserve [Line Items]
Expense to write off	$ 200