Fair Value Measurements - Reconciliation of Recurring Financial Liability Related to Interest Rate Swaps (Details) - Designated As Hedging - Cash Flow Hedge - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2016	Dec. 31, 2015
Interest rate swap
Reconciliation of the recurring financial derivatives
Beginning balance, derivative liability	$ (768)	$ (1,020)
Total gains/(losses) for the period:
Included in earnings	709	768
Included in other comprehensive income	(547)	(516)
Ending balance, derivative liability	(606)	(768)
Foreign currency hedges
Reconciliation of the recurring financial derivatives
Beginning balance, derivative asset	0
Total gains/(losses) for the period:
Included in earnings	0
Included in other comprehensive income	(234)
Ending balance, derivative asset	$ (234)	$ 0

Fair Value, Liabilities Measured on Recurring Basis, Reconciliation, Calculation [Roll Forward]

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- Definition

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

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-Publisher FASB
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- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313

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The net gain (loss) during the reporting period due to ineffectiveness in interest rate cash flow hedges. Recognized in earnings.

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