Annual report pursuant to Section 13 and 15(d)

Retirement Plans and Related Post Retirement Benefits - Details of Multi Employer Plans (Detail)

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Retirement Plans and Related Post Retirement Benefits - Details of Multi Employer Plans (Detail) (WCTPP [Member], USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
WCTPP [Member]
 
Multiemployer Plans [Line Items]  
EIN/Pension Plan Number 916145047
Zone Status Green
Rehabilitation Plan Status No
2013 Company Contributions $ 830
Surcharge Imposed No
Collective Bargaining Agreement Oct. 31, 2016
Plan Year End --12-31