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Derivative and Nonderivative Hedging Instrument Fair Value Disclosure (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Asset Derivatives [Abstract]
Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets	$ 2,795	$ 2,945
Liability Derivatives [Abstract]
Total liability derivatives	846	1,383
Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Liability Derivatives [Abstract]
Interest rate swap contracts	509	934
Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Asset Derivatives [Abstract]
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value	137	169
Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member]
Liability Derivatives [Abstract]
Foreign exchange forward contracts	337	449
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Asset Derivatives [Abstract]
Interest Rate Derivative Assets, at Fair Value	1,922	1,830
Interest Rate Cap [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Asset Derivatives [Abstract]
Interest Rate Derivative Assets, at Fair Value	290	376
Interest Rate Cap [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Asset Derivatives [Abstract]
Interest Rate Derivative Assets, at Fair Value	5	3
Interest Rate Cap [Member] | Not Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
Asset Derivatives [Abstract]
Interest Rate Derivative Assets, at Fair Value	434	563
Interest Rate Cap [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member]
Asset Derivatives [Abstract]
Interest Rate Derivative Assets, at Fair Value	$ 7	$ 4

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-Publisher FASB
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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

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