Income Taxes - Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets:
Accounts receivable reserves	$ 812	$ 982
Accrued liabilities	3,005	2,753
Deferred compensation obligation	1,060	895
Pension and post-retirement benefit plans	755	0
Other	11	74
Deferred tax assets, current	5,643	4,704
Liabilities:
Prepaid expenses	(260)	(186)
Fixed assets	(232)	0
Other	(352)	0
Deferred tax asset, net – current	4,799	4,518
Assets:
Accrued liabilities	395	613
Deferred compensation obligation	8,146	6,956
Stock-based compensation	2,196	1,817
Pension and post-retirement benefit plans	5,274	5,303
Goodwill and intangible assets	3,869	7,543
Other	219	320
Deferred tax assets, non-current	20,099	22,552
Liabilities:
Fixed assets	(1,361)	(1,198)
Other	(3)	(331)
Deferred tax liabilities, non-current	(1,364)	(1,529)
Valuation allowance	(85)	(85)
Deferred tax asset, net – non-current	18,650	20,938
Net deferred tax asset	$ 23,449	$ 25,456