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Derivatives and Hedging Activities Notional Amounts (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative Asset, Notional Amount | $ 0 | $ 0
Derivative Liability, Notional Amount | 0 | 0
Long [Member] | Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative Asset, Notional Amount | 9,577 | 4,056
Short [Member] | Foreign Exchange Forward [Member] | Not Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Derivative Liability, Notional Amount | $ 11,771 | $ 11,157

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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Notional Amount -URI http://asc.fasb.org/extlink&oid=6519104 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5580258-113959 + Details
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