Schedule of Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Accrued employee benefit plan costs	$ 7,422	$ 7,607
Stock based compensation	972	786
Net operating loss and tax credit carryforwards	99,281	102,190
Restructuring fees not currently deductible for tax purposes	2,264	3,113
Disallowed business interest expense carryforward	5,105	2,936
Other	3,380	5,890
Gross deferred tax assets	118,424	122,522
Less valuation allowance	(103,496)	(106,447)
Net deferred tax assets	14,928	16,075
Depreciation and amortization	(11,246)	(11,149)
Outside basis difference deferred tax liability	(2,892)	(2,891)
Other	(2,981)	(3,553)
Gross deferred tax liabilities	(17,119)	(17,593)
Net deferred tax assets (liabilities)	$ (2,191)	$ (1,518)