1. Summary of Significant Accounting Policies (Detail - Property Plant and Equipment) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Land	$ 5,260	$ 5,260
Buildings	31,914	31,751
Machinery and equipment	113,633	105,160
Total property, plant and equipment	$ 150,807	$ 142,171
Building And Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	30 years
Building And Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	40 years
Machinery And Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	3 years
Machinery And Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful lives	15 years