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Saving and Retirement Plans Non Qualified Deferred Compensation Plan (Tables) | 12 Months Ended
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Dec. 31, 2016
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |
Deferred Compensation Arrangement with Individual Disclosure, Postretirement Benefits [Table Text Block] | The following table reflects the balances of the assets and deferred compensation liabilities of the Rabbi trust in the accompanying Consolidated Balance Sheets:
Non Qualified Deferred Compensation Plan Component (1) | Year ended December 31,
(in thousands) | 2016 |  | 2015
Assets: |  |  |
Trading securities held in trust | $ | 28,588 |  |  | 29,093 |
Liabilities: |  |  |
Accounts payable and other liabilities | $ | 28,214 |  |  | 28,632 |
(1) Assets and liabilities of the Rabbi trust are exclusive of the shares of the Company's common stock.

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- Definition Tabular disclosure of pension and other postretirement benefit arrangements with individual employees, which are generally based on employment contracts between the entity and one or more selected officers or key employees, and which contain a promise by the employer to pay certain amounts at designated future dates, usually including a period after retirement, upon compliance with stipulated requirements. This type of arrangement is distinguished from broader based employee benefit plans as it is usually tailored to the employee. Disclosure also typically includes the amount of related compensation expense recognized during the reporting period and the carrying amount as of the balance sheet date of the related liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 25 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6409733&loc=d3e19512-108361 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367 Reference 3: 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 Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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