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Fair-Value Measurements (Schedule of Fair Value of Financial Assets and Liabilities) (Details) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets (Level 1) [Member] |  |  |  |
Assets: |  |  |  |
Cash equivalents | $ 23,432 |  | $ 14,096 |
Foreign currency instruments | 78 |  | 69 |
Common stock of foreign public company | $ 913 |  | $ 701 |
Liabilities: |  |  |  |
Interest rate swap |  |  |  |
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member] |  |  |  |
Assets: |  |  |  |
Cash equivalents |  |  |  |
Foreign currency instruments |  |  |  |
Common stock of foreign public company |  |  |  |
Liabilities: |  |  |  |
Interest rate swap | $ (1,679) | [1] | $ (1,411) | [2]
Interest Rate Swap [Member] |  |  |  |
Derivative liability: |  |  |  |
Liability for fixed rate leg | 4,700 |  | 5,700 |
Receivable for floating rate leg | $ 3,000 |  | $ 4,300 |
[1] | Net of $3.0 million receivable floating leg and $4.7 million liability fixed leg
[2] | Net of $4.3 million receivable floating leg and $5.7 million liability fixed leg

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- Definition Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 + Details
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