Multiemployer Plans (Details) (USD $)
In Thousands, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Multiemployer plans | |||
Number of pension plans in which annual contribution was made by the entity during last three years | 59 | ||
Number of pension plans in which the entity contributed | 2 | ||
Contributions for specified plans | $ 1,427 | ||
Contributions for significant plans | 29,915 | 19,014 | 14,135 |
Contributions to other multiemployer plans | 13,004 | 11,089 | 10,047 |
Total contributions made | 42,919 | 30,103 | 24,182 |
Central Pension Fund of the International Union of Operating Engineers and Participating Employers
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Multiemployer plans | |||
Contributions for significant plans | 7,286 | 2,206 | 1,797 |
Laborers International Union of North America National (Industrial) Pension Fund
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Multiemployer plans | |||
Contributions for significant plans | 5,025 | 1,995 | 1,740 |
Southern California Pipetrades Trust Funds
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Multiemployer plans | |||
Contributions for significant plans | 6,179 | 5,298 | 2,931 |
Pipeline Industry Benefit Fund
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Multiemployer plans | |||
Contributions for significant plans | 4,605 | 1,747 | 1,793 |
Laborers Pension Trust Fund for Northern California
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Multiemployer plans | |||
Contributions for significant plans | 3,869 | 4,816 | 3,501 |
Construction Laborers Pension Trust for Southern California
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Multiemployer plans | |||
Contributions for significant plans | $ 2,951 | $ 2,952 | $ 2,373 |