XML 20 R55.htm IDEA: XBRL DOCUMENT v2.4.0.8
Post Retirement Benefits - Multiemployer Plans (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Multiemployer plan, postretirement benefit
Aug. 12, 2012
Multiemployer plan, postretirement benefit
August 8, 2011 through August 12, 2012
Aug. 09, 2016
Multiemployer plan, postretirement benefit
August 13, 2012 through August 10, 2013
Aug. 09, 2015
Multiemployer plan, postretirement benefit
August 13, 2012 through August 10, 2013
Aug. 11, 2014
Multiemployer plan, postretirement benefit
August 13, 2012 through August 10, 2013
Aug. 10, 2013
Multiemployer plan, postretirement benefit
August 13, 2012 through August 10, 2013
Multiemployer plans:                
Certified zone status, percent funded limit for yellow status 80.00%              
Certified zone status, percent funded limit for green status 80.00%              
Certified zone status, percent funded limit for red status 65.00%              
Multi-employer plan contributions $ 464 [1] $ 443 [1]            
Maximum percentage of total contribution     5.00%          
Multiemployer plans, collective-bargaining arrangement, maximum hours of work per week for employer contribution     40 hours          
Multiemployer plans, collective-bargaining arrangement, rate of employer contribution       1.20 1.40 1.35 1.30 1.25
[1] The National Pension Plan utilized a five year amortization extension in accordance with § 431(d) of the Internal Revenue Code of 1986 ("the Code") to amortize its losses from 2008. The plan re-certified its zone status after using the amortization provisions of the Code. The Company's contributions to the plan did not represent more than 5% of total contributions to the plan as indicated in the plan's most recently available annual report for the plan year ended December 31, 2012. Under the terms of the collective-bargaining agreement, the Company is required to make contributions to the plan for each hour worked up to a maximum of 40 hours per person, per week, at the following rates: $1.20 per hour from August 8, 2011 through August 12, 2012; $1.25 per hour from August 13, 2012 through August 10, 2013