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Nature of Operations and Summary of Significant Accounting Policies (Detail) $ in Thousands		3 Months Ended		12 Months Ended
	Jan. 03, 2012 subsidiary	Jun. 30, 2015 USD ($)	Jun. 30, 2010	Dec. 31, 2016 USD ($) segment	Dec. 31, 2015 USD ($) segment	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012	Feb. 26, 2016	Sep. 30, 2015
Accounting Policies [Line Items]
Number of subsidiaries distributed to company | subsidiary	3
Number of reportable segments | segment				2	2
Shipping and handling revenue (in dollars)				$ 13,974	$ 14,498	$ 16,209
Research and development expense (in dollars)				916	748	$ 1,622
Debt instrument, fair value disclosure (in dollars)				37,412	34,603
Long-term debt, including current maturities				$ 36,001	33,460
Pension Benefit Plan [Member]
Accounting Policies [Line Items]
Employer contributions		$ 741			$ 741
Minimum [Member] | Building and Improvements [Member]
Accounting Policies [Line Items]
Useful life					20 years
Minimum [Member] | Transportation Equipment Assets [Member]
Accounting Policies [Line Items]
Useful life					5 years
Minimum [Member] | Machinery Equipment [Member]
Accounting Policies [Line Items]
Useful life					10 years
Maximum [Member] | Building and Improvements [Member]
Accounting Policies [Line Items]
Useful life					40 years
Maximum [Member] | Transportation Equipment Assets [Member]
Accounting Policies [Line Items]
Useful life					6 years
Maximum [Member] | Machinery Equipment [Member]
Accounting Policies [Line Items]
Useful life					12 years
ICP [Member]
Accounting Policies [Line Items]
Equity method ownership percentage (percent)				30.00%					30.00%	30.00%
Ownership percentage sold (percent)			50.00%					20.00%
Retained Earnings | Immaterial Error Correction [Member]
Accounting Policies [Line Items]
Immaterial error correction to long term incentive compensation							$ (1,027)
Additional Paid-In Capital | Immaterial Error Correction [Member]
Accounting Policies [Line Items]
Immaterial error correction to long term incentive compensation							$ 1,027

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