Equity and Noncontrolling Interest (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

						Unrealized Gain (Loss) in
				Defined
		Currency		Benefit		Available-for-
		Translation		Pension		Sale
		Adjustments		Plans		Securities		Total
Balance as of December 31, 2014		$	(14,312)	$	(41,551)	$	1,457	$	(54,406)
	Other comprehensive (loss) income before reclassifications		(24,232)		5,057		(850)		(20,025)
	Amounts reclassified from AOCI		—		3,642		(632)		3,010
	Related tax amounts		—		(2,399)		504		(1,895)
Balance as of December 31, 2015			(38,544)		(35,251)		479		(73,316)
	Other comprehensive (loss) income before reclassifications		(13,711)		(4,229)		834		(17,106)
	Amounts reclassified from AOCI		—		3,075		(17)		3,058
	Related tax amounts		—		237		(280)		(43)
Balance as of December 31, 2016			(52,255)		(36,168)		1,016		(87,407)
	Other comprehensive income (loss) before reclassifications		20,362		(1,646)		2,299		21,015
	Amounts reclassified from AOCI		—		5,154		(2,494)		2,660
	Related tax amounts		—		(1,433)		65		(1,368)
Balance as of December 31, 2017		$	(31,893)	$	(34,093)	$	886	$	(65,100)