Accumulated Other Comprehensive Income (Loss) (Tables)

12 Months Ended

Dec. 31, 2016

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, 2014	$	1,647		$	(6,040	)	$	(4,393	)
Unrealized gains (losses)	(2,798		)	—			(2,798		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			2,786			2,786
Tax effect	—			(1,095		)	(1,095		)
Unrecognized amounts from defined benefit pension plans	—			(9,923		)	(9,923		)
Tax effect	—			3,900			3,900
Net of tax amount	(2,798		)	(4,332		)	(7,130		)
Balance at December 31, 2014	$	(1,151	)	$	(10,372	)	$	(11,523	)
Unrealized gains (losses)	(5,093		)	—			(5,093		)
Amounts reclassified from accumulated other comprehensive income (loss)	—			4,774			4,774
Tax effect	—			(1,878		)	(1,878		)
Unrecognized amounts from defined benefit pension plans	—			538			538
Tax effect	—			(212		)	(212		)
Net of tax amount	(5,093		)	3,222			(1,871		)
Balance at December 31, 2015	$	(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	)