Equity and Noncontrolling Interest (Tables)

9 Months Ended

Sep. 30, 2017

Stockholders Equity [Abstract]

Schedule of Stockholders Equity [Table Text Block]

									Accumulated
					Capital in				Other
			Common		Excess of		Retained		Comprehensive		Noncontrolling
			Stock		Par Value		Earnings		Loss		Interest		Total
Balance at June 30, 2017			$	13,310	$	113,747	$	374,001	$	(72,938)	$	11,474	$	439,594
	Net income			—		—		11,142		—		562		11,704
	Amounts reported in other comprehensive
		income (loss)		—		—		—		6,265		(153)		6,112
	Dividends ($0.355 per share)			—		—		(4,722)		—		—		(4,722)
	Share issuance and equity-based
		compensation plans		(11)		(618)		—		—		—		(629)
Balance at September 30, 2017			$	13,299	$	113,129	$	380,421	$	(66,673)	$	11,883	$	452,059
Balance at June 30, 2016			$	13,250	$	109,751	$	340,127	$	(71,790)	$	8,895	$	400,233
	Net income			—		—		16,008		—		343		16,351
	Amounts reported in other comprehensive
		(loss) income		—		—		—		(237)		177		(60)
	Dividends ($0.345 per share)			—		—		(4,575)		—		—		(4,575)
	Acquisition of noncontrolling interest			—		—		—		—		40		40
	Share issuance and equity-based
		compensation plans		7		1,671		—		—		—		1,678
	Excess tax benefit from stock option exercises			—		31		—		—		—		31
Balance at September 30, 2016			$	13,257	$	111,453	$	351,560	$	(72,027)	$	9,455	$	413,698

									Accumulated
					Capital in				Other
			Common		Excess of		Retained		Comprehensive		Noncontrolling
			Stock		Par Value		Earnings		Loss		Interest		Total
Balance at December 31, 2016			$	13,278	$	112,475	$	364,414	$	(87,407)	$	9,846	$	412,606
	Net income			—		—		30,040		—		1,619		31,659
	Amounts reported in other comprehensive
		income		—		—		—		20,734		418		21,152
	Dividends ($1.055 per share)			—		—		(14,033)		—		—		(14,033)
	Share issuance and equity-based
		compensation plans		21		654		—		—		—		675
Balance at September 30, 2017			$	13,299	$	113,129	$	380,421	$	(66,673)	$	11,883	$	452,059
Balance at December 31, 2015			$	13,288	$	106,333	$	326,740	$	(73,316)	$	8,198	$	381,243
	Net income			—		—		43,969		—		1,131		45,100
	Amounts reported in other comprehensive
		income		—		—		—		1,289		86		1,375
	Repurchases of common stock			(84)		—		(5,775)		—		—		(5,859)
	Dividends ($1.01 per share)			—		—		(13,374)		—		—		(13,374)
	Acquisition of noncontrolling interest			—		—		—		—		40		40
	Share issuance and equity-based
		compensation plans		53		4,953		—		—		—		5,006
	Excess tax benefit from stock option exercises			—		167		—		—		—		167
Balance at September 30, 2016			$	13,257	$	111,453	$	351,560	$	(72,027)	$	9,455	$	413,698

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

							Unrealized
			Currency		Defined		Gain (Loss) in
			Translation		Benefit		Available-for-
			Adjustments		Pension Plans		Sale Securities		Total
Balance at June 30, 2017			$	(40,062)	$	(34,059)	$	1,183	$	(72,938)
	Other comprehensive income (loss) before
		reclassifications		5,917		(611)		688		5,994
	Amounts reclassified from AOCI			—		784		(254)		530
	Current period other comprehensive income			5,917		173		434		6,524
	Related tax amounts			—		(111)		(148)		(259)
	Net current period other comprehensive income			5,917		62		286		6,265
Balance at September 30, 2017			$	(34,145)	$	(33,997)	$	1,469	$	(66,673)
Balance at June 30, 2016			$	(38,812)	$	(34,070)	$	1,092	$	(71,790)
	Other comprehensive (loss) income before
		reclassifications		(892)		3		575		(314)
	Amounts reclassified from AOCI			—		713		(280)		433
	Current period other comprehensive (loss) income			(892)		716		295		119
	Related tax amounts			—		(256)		(100)		(356)
	Net current period other comprehensive (loss) income			(892)		460		195		(237)
Balance at September 30, 2016			$	(39,704)	$	(33,610)	$	1,287	$	(72,027)

							Unrealized
			Currency		Defined		Gain (Loss) in
			Translation		Benefit		Available-for-
			Adjustments		Pension Plans		Sale Securities		Total
Balance at December 31, 2016			$	(52,255)	$	(36,168)	$	1,016	$	(87,407)
	Other comprehensive income (loss) before
		reclassifications		18,110		(684)		1,578		19,004
	Amounts reclassified from AOCI			—		4,284		(889)		3,395
	Current period other comprehensive income			18,110		3,600		689		22,399
	Related tax amounts			—		(1,429)		(236)		(1,665)
	Net current period other comprehensive income			18,110		2,171		453		20,734
Balance at September 30, 2017			$	(34,145)	$	(33,997)	$	1,469	$	(66,673)
Balance at December 31, 2015			$	(38,544)	$	(35,251)	$	479	$	(73,316)
	Other comprehensive (loss) income before
		reclassifications		(1,160)		116		1,087		43
	Amounts reclassified from AOCI			—		2,313		136		2,449
	Current period other comprehensive (loss) income			(1,160)		2,429		1,223		2,492
	Related tax amounts			—		(788)		(415)		(1,203)
	Net current period other comprehensive (loss) income			(1,160)		1,641		808		1,289
Balance at September 30, 2016			$	(39,704)	$	(33,610)	$	1,287	$	(72,027)