Reorganization - Schedule of Rolls Forward of Activity in Reorganization Accrual (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restructuring Cost And Reserve [Line Items]
Accrual Beginning Balance			$ 481
Additions	$ 11	$ 81	1,026	$ 3,505
Cash payments			(1,367)
Accrual Ending Balance	140		140
Workforce Reduction [Member]
Restructuring Cost And Reserve [Line Items]
Accrual Beginning Balance			41
Additions			1,022
Cash payments			(924)
Accrual Ending Balance	139		139
Subsidiary Liquidation [Member]
Restructuring Cost And Reserve [Line Items]
Accrual Beginning Balance			7
Cash payments			(7)
Products Group Reorganization [Member]
Restructuring Cost And Reserve [Line Items]
Accrual Beginning Balance			433
Additions			4
Cash payments			(436)
Accrual Ending Balance	$ 1		$ 1