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Employee Benefit Plans (Details 4) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Deferred Compensation Plan |  |  |
Liabilities, including the Company's common stock | $ 33,211,000 | $ 23,893,000 |
Savings Investment Plan |  |  |
Defined Contribution plans |  |  |
Contribution match on portion of employee salary (as a percent) | 6.00% |  |
Discretionary profit sharing contribution Plan |  |  |
Discretionary profit sharing contribution match on portion of employee salary and bonus (as a percent) | 9.00% |  |
Plan contributions charged to expense | 6,900,000 | 6,300,000 | 5,600,000
Deferred compensation plan |  |  |
Deferred Compensation Plan |  |  |
Market value of the trust assets, excluding the Company's common stock | 12,500,000 | 10,600,000 |
Liabilities, including the Company's common stock | 33,200,000 | 23,900,000 |
Company's common stock held in the rabbi trust | 5,700,000 | 5,700,000 |
Number of common stock deferred into the rabbi trust (in shares) | 534,174 |  |
General and Administrative expense recognized due to increase in the closing price of the Company's shares held in the trust and also due to the sale of shares in the Company's stock | 7,400,000 |  |
Plan contributions charged to expense | $ 742,605 | $ 661,676 | $ 522,807

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- Definition Represents the number of common stock representing vested performance share awards that were deferred into the rabbi trust. + References No definition available. + Details
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- Definition Represents the market value of the trust assets, excluding the entity's common stock. + References No definition available. + Details
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- Definition Represents the plan contributions that are charged to expense. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan. + References No definition available. + Details
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- Definition Represents the expense recognized due to increase in the closing price of the entity's shares held in the trust and also due to the sale of shares in the entity's stock. + References No definition available. + Details
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- Definition Aggregate value of common stock held in a trust that has been set up specifically to accumulate stock for the sole purpose of distribution to participating employees but not yet earned. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 25 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=6409836&loc=d3e19850-108362 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=6409836&loc=d3e19833-108362 + Details
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- Definition The compensation expense recognized during the period pertaining to the deferred compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363 + Details
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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer). + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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