Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Glossary Other Comprehensive Income
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-Publisher FASB
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Fair value as of the balance sheet date of all foreign currency derivative liabilities designated as cash flow hedging instruments.

+ References

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-Name Accounting Standards Codification
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-Paragraph 4B
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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Amount before tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount of tax expense (benefit) allocated to other comprehensive income (loss) attributable to parent entity.

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Accumulated Other Comprehensive Loss (Details) $ in Thousands, € in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Nov. 30, 2016 EUR (€)
Components of comprehensive income
Net income	$ 4,620	$ 4,066
Mark to market of foreign exchange hedges	49
Deferred income tax benefit (expense)	(18)
Comprehensive income	4,651	4,066
Foreign exchange hedges liabilities	303	352
Accrued Expenses
Components of comprehensive income
Foreign exchange hedges liabilities	265	309
Other liabilities
Components of comprehensive income
Foreign exchange hedges liabilities	$ 38	$ 43
Foreign Exchange Contract \| Designated as Hedging Instrument
Components of comprehensive income
Notional amount \| €			€ 5.5