Reorganization - Schedule of Rolls Forward of Activity in Reorganization Accrual (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring Cost And Reserve [Line Items]
Accrual Beginning Balance	$ 118	$ 121
Additions	4,433	1,817	$ 1,905
Cash payments	(3,595)	(1,820)
Non-cash charge	(475)
Accrual Ending Balance	481	118	121
Workforce Reduction [Member]
Restructuring Cost And Reserve [Line Items]
Accrual Beginning Balance	118	121
Additions	3,173	1,817
Cash payments	(3,250)	(1,820)
Accrual Ending Balance	41	$ 118	$ 121
Subsidiary Liquidation [Member]
Restructuring Cost And Reserve [Line Items]
Additions	334
Cash payments	(9)
Non-cash charge	(318)
Accrual Ending Balance	7
Products Group Reorganization [Member]
Restructuring Cost And Reserve [Line Items]
Additions	926
Cash payments	(336)
Non-cash charge	(157)
Accrual Ending Balance	$ 433