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Benefit Plans - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Letters of credit with bank | $ 6,751 |  |
Employees eligibility | Completed one year of service and are at least 21 years of age |  |
Minimum years of service required to participate in Company sponsored saving and profit sharing plan | 1 year |  |
Minimum age required to participate in Company sponsored saving and profit sharing plan | 21 |  |
Employers contribution and compensation | Match 50% of employees' contributions up to 5% of eligible compensation |  |
Employers contribution as percentage of employees contribution | 50.00% |  |
Employers contribution as percentage of employees compensation | 5.00% |  |
Employees contribution limit | 100.00% |  |
Fully vesting period of contribution | 3 years |  |
Minimum age for entitlement to benefit of deferred compensation plan | 30 |  |
Minimum years of experience to attain the benefit of deferred compensation plan | 10 Years |  |
Deferred compensation arrangement with individual employees contribution minimum | 3 |  |
Deferred compensation arrangement with individual employees contribution maximum | 8 |  |
Deferred Profit Sharing [Member] |  |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Employer's contribution | 3,581 | 3,184 | 2,870
Deferred Compensation Plan [Member] |  |  |
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items] |  |  |
Employer's contribution | $ 1,323 | $ 1,260 | $ 1,223

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- Definition The amount of payment into the fund established for purposes of making future disbursements to the individual in accordance with the terms and understanding of the deferred compensation arrangement. + References No definition available. + Details
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- Definition The minimum period that the individual is required to perform services in order to be fully vested under 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 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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