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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Summary of Significant Accounting Policies [Abstract] |  |  |
Goodwill, Impairment Loss | $ 1,000,000 | $ 0 | $ 3,045,000
Accretion (Amortization) of Discounts and Premiums, Investments | 983,000 | 1,234,000 |
Cash Equivalents, at Carrying Value | $ 58,436,000 | $ 3,309,000 |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 9,000 | 374,000 | 26,000
Advertising Expense | $ 19,629,000 | $ 16,024,000 | $ 14,892,000
Shipping, Handling and Transportation Costs | $ 32,395,000 | 27,079,000 | 24,176,000
Defined Benefit Plan Matching Contribution Percentage Of Employees Contributions | 50.00% |  |
Defined Benefit Plan Maximum Percentage To Be Matched Of Employees Compensation | 6.00% |  |
Pension Cost (Reversal of Cost) | $ 1,819 | $ 1,633,000 | $ 1,602,000

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- Definition Percentage of employees' contributions used to make discretionary match. + References No definition available. + Details
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- Definition Maximum percent of employees compensation to be matched by employer. + References No definition available. + Details
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- Definition Summary of Significant Accounting Policies [Abstract] + References No definition available. + Details
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- Definition The sum of the periodic adjustments of the differences between securities' face values and purchase prices that are charged against earnings. This is called accretion if the security was purchased at a discount and amortization if it was purchased at premium. As a noncash item, this element is an adjustment to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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