Fair Value of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2018

Fair Value Disclosures [Abstract]

Derivative Instruments, Gain (Loss) [Table Text Block]

Derivatives in subtopic 815-20 Cash Flow Hedging Relationship	Amount of Unrealized Gain or (Loss) Recognized in Accumulated other Comprehensive Income on Derivative				Location of Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income(A)	Amount of Realized Gain or (Loss) Reclassified from Accumulated Other Comprehensive Income
	2018		2017			2018		2017
Foreign exchange contracts	$	913,000	$	642,000	Cost of goods sold	$	146,000	$	18,000
					Sales, general and administrative expense	$	22,000	$	2,000
Interest rate swaps	$	24,000	$	—	Interest Expense	$	—	$	—

Fair Value, by Balance Sheet Grouping [Table Text Block]

	Fair Value of Derivative Instruments
	March 31, 2018
	Asset Derivatives			Liability Derivatives
	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Foreign exchange contracts	Prepaid expense other current assets	$	478,000	Accrued liabilities other	$	31,000
Notional contract values		$	12,206,000		$	7,178,000
Interest rate swaps	Prepaid expense other current assets	$	24,000	Accrued liabilities other	$	—
Notional swap values		$	34,344,000		$	—
	December 31, 2017
	Asset Derivatives			Liability Derivatives
	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Foreign exchange contracts	Prepaid expense other current assets	$	—	Accrued liabilities other	$	298,000
Notional contract values		$	—		$	8,766,000
Interest rate swaps	Prepaid expense other current assets	$	—	Accrued liabilities other	$	—
Notional swap values		$	—		$	—