Reorganization - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Mar. 31, 2015	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2015
Restructuring Cost and Reserve [Line Items]
Percentage of workforce reduction		4.00%		1.00%
Severance costs			$ 3,200	$ 1,800
Reorganization costs			4,433
Forecast [Member]
Restructuring Cost and Reserve [Line Items]
Expected increase in the workforce					1.00%
Subsidiary Liquidation [Member]
Restructuring Cost and Reserve [Line Items]
Reorganization costs			332
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