Income Taxes (Components of Deferred Tax Asset and Liability) (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Accounts receivable	$ 225	$ 218
Inventories	743	741
Net operating loss carryforwards	3,851	4,213
Other accrued liabilities	4,592	2,745
Pension	3,545	3,684
Tax Credits	1,687	1,634
Total deferred tax assets	14,643	13,235
Deferred tax liabilities:
Intangible assets	4,224	4,077
Property, plant and equipment	21,117	15,101
Total deferred tax liabilities	25,341	19,178
Valuation allowance	4,903	4,307
Net deferred tax liabilities	$ (15,601)	$ (10,250)