Derivative Instruments, Fair Values Derivatives, Balance Sheet Location (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Estimated fair value of the contracts in the consolidated balance sheets [Abstract]
Asset derivatives	$ 113	$ 43
Liability derivatives	(191)	(103)
Net fair value	(78)	(60)
Foreign Exchange Contracts [Member] | Prepaid Expenses and Other Current Assets [Member]
Estimated fair value of the contracts in the consolidated balance sheets [Abstract]
Asset derivatives	113	43
Interest Rate Swaps [Member] | Other Liabilities [Member]
Estimated fair value of the contracts in the consolidated balance sheets [Abstract]
Liability derivatives	$ (191)	$ (103)