Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Schedule of accumulated other comprehensive income (loss) [Table Text Block]

The following summarizes the components of other comprehensive income (loss) accumulated in shareholders’ equity:

	Foreign Currency Translation Adjustments			Defined Benefit Pension Plans			Accumulated Other Comprehensive Income (Loss)
Balance at January 1, 2016	$	(6,244	)	$	(7,150	)	$	(13,394	)
Unrealized gains (losses)	744			—			744
Amounts reclassified from accumulated other comprehensive income (loss)	—			2,844			2,844
Tax effect	—			(1,137		)	(1,137		)
Unrecognized amounts from defined benefit pension plans	—			(2,032		)	(2,032		)
Tax effect	—			813			813
Net of tax amount	744			488			1,232
Balance at December 31, 2016	$	(5,500	)	$	(6,662	)	$	(12,162	)
Unrealized gains (losses)	2,195			—			2,195
Amounts reclassified from accumulated other comprehensive income (loss)	—			4,822			4,822
Tax effect	—			(1,962		)	(1,962		)
Unrecognized amounts from defined benefit pension plans	—			(2,169		)	(2,169		)
Tax effect	—			883			883
Net of tax amount	2,195			1,574			3,769
Balance at December 31, 2017	$	(3,305	)	$	(5,088	)	$	(8,393	)
Unrealized gains (losses)	(2,514		)	—			(2,514		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			6,291			6,291
Tax effect	—			(145		)	(145		)
Unrecognized amounts from defined benefit pension plans	—			(279		)	(279		)
Tax effect	—			6			6
Net of tax amount	(2,514		)	5,873			3,359
Balance at December 31, 2018	$	(5,819	)	$	785		$	(5,034	)