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Debt - Summary of Interest Rate Swaps Included on Balance Sheets (Details 4) - Interest Rate Swap - Designated as Hedging Instrument - Cash Flow Hedging - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accrued Liabilities
Interest rate swaps included on the balance sheet
Accrued liabilities	$ 791	$ 640
Other Noncurrent Liabilities
Interest rate swaps included on the balance sheet
Other long-term obligations	$ (23)	$ 380

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, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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