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Employee Benefits (Details 2) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2011 plan investment | Dec. 31, 2010 | Dec. 31, 2009
Deferred compensation plan |  |  |
Number of investments against the values of which, employee may be allowed to reduce their compensation | 4 |  |
Number of investments, which are taken as reference to measure the interest that may be acquired | 3 |  |
Employer contribution as percentage of the employees' reduced compensation | 3.00% |  |
Number of deferred compensation plans | 2 |  |
Deferred compensation plan expense (income) | $ (1,505,000) | $ 4,267,000 | $ 4,340,000
Deferred compensation plan liability included in other liabilities | 29,647,000 | 28,444,000 |
Deferred compensation plan assets included in other current assets | 33,924,000 | 32,739,000 |
Investment income (loss) related to the mark-to-market of investments treated as trading securities | (1,584,000) | 4,203,000 | 4,253,000
Defined contribution plan covering domestic, salaried and clerical employees |  |  |
Defined contribution pans |  |  |
Employer contribution (as a percent of employee contributions) | 50.00% | 50.00% | 100.00%
Employer contribution limit per calendar year (as a percent of compensation) | 6.00% | 6.00% | 3.00%
Vesting percentage after one year of service | 20.00% |  |
Additional vesting percentage with each additional completed year of service | 20.00% |  |
Contribution expense | 1,956,000 | 1,826,000 | 1,868,000
Defined contribution plan covering hourly, non union and Daily's employees |  |  |
Defined contribution pans |  |  |
Number of defined contribution plans covering Daily's employees | 2 |  |
Contribution expense | $ 507,000 | $ 1,455,000 | $ 1,378,000

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- Definition Represents the employer's contribution as a percentage of employees' reduced compensation under the deferred compensation plan which allows certain employees to reduce their compensation in exchange for values in investments. + References No definition available. + Details
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- Definition Represents the number of investments, which are taken as reference to measure the interest that may be acquired by employees in exchange for reduction in their compensation. + References No definition available. + Details
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- Definition Represents the number of investments against the values of which, employees may be allowed to reduce their compensation under deferred compensation plan. + References No definition available. + Details
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- Definition The limit of annual employee contributions to the plan per calendar year as a percentage of compensation. + References No definition available. + Details
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