Derivative Financial Instruments Derivative and Nonderivative Hedging Instrument Fair Value Disclosure (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Asset Derivatives [Abstract]
Derivative Asset	$ 3,082	$ 182
Liability Derivatives [Abstract]
Derivative Liability	967	1,553
Other Current Liabilities [Member] \| Interest Rate Swap [Member]
Liability Derivatives [Abstract]
Derivative Liability, Current	868	1,317
Designated as Hedging Instrument [Member] \| Other Noncurrent Assets [Member] \| Interest Rate Cap [Member]
Asset Derivatives [Abstract]
Derivative Asset, Noncurrent	1,423	0
Designated as Hedging Instrument [Member] \| Other Noncurrent Assets [Member] \| Interest Rate Swap [Member]
Asset Derivatives [Abstract]
Derivative Asset, Noncurrent	1,632	75
Not Designated as Hedging Instrument [Member] \| Other Current Assets [Member]
Asset Derivatives [Abstract]
Foreign exchange forward contracts	27	107
Not Designated as Hedging Instrument [Member] \| Other Current Liabilities [Member]
Liability Derivatives [Abstract]
Foreign exchange forward contracts	$ 99	$ 236

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.

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