Reorganization - Summary of Rolls Forward of Activity in Reorganization Accrual (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring Cost and Reserve [Line Items]
Accrual Beginning Balance			$ 118
Additions	$ 81	$ 1,039	3,505	$ 1,888
Cash payments			(2,768)
Non-cash charge			(318)
Accrual Ending Balance	537		537
Workforce Reduction [Member]
Restructuring Cost and Reserve [Line Items]
Accrual Beginning Balance			118
Additions			3,173
Cash payments			(2,768)
Accrual Ending Balance	523		523
Subsidiary Liquidation [Member]
Restructuring Cost and Reserve [Line Items]
Additions	300		332
Non-cash charge			(318)
Accrual Ending Balance	$ 14		$ 14