Equity and Noncontrolling Interest (Tables)

6 Months Ended

Jun. 30, 2018

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 March 31, 2018			$	13,323	$	93,731	$	373,185	$	(58,738)	$	1,262	$	422,763
	Net income			—		—		19,246		—		124		19,370
	Amounts reported in other comprehensive
		loss		—		—		—		(15,613)		(171)		(15,784)
	Dividends ($0.37 per share)			—		—		(4,933)		—		—		(4,933)
	Share issuance and equity-based
		compensation plans		8		1,253		—		—		—		1,261
Balance at June 30, 2018			$	13,331	$	94,984	$	387,498	$	(74,351)	$	1,215	$	422,677
Balance at March 31, 2017			$	13,291	$	112,838	$	366,819	$	(81,961)	$	10,988	$	421,975
	Net income			—		—		11,906		—		435		12,341
	Amounts reported in other comprehensive
		income		—		—		—		9,023		51		9,074
	Dividends ($0.355 per share)			—		—		(4,724)		—		—		(4,724)
	Share issuance and equity-based
		compensation plans		19		909		—		—		—		928
Balance at June 30, 2017			$	13,310	$	113,747	$	374,001	$	(72,938)	$	11,474	$	439,594

									Accumulated
					Capital in				Other
			Common		Excess of		Retained		Comprehensive		Noncontrolling
			Stock		Par Value		Earnings		Loss		Interest		Total
Balance at December 31, 2017			$	13,308	$	93,528	$	365,182	$	(65,100)	$	1,946	$	408,864
	Net income			—		—		31,978		—		179		32,157
	Amounts reported in other comprehensive
		loss		—		—		—		(9,251)		(76)		(9,327)
	Dividends ($0.725 per share)			—		—		(9,662)		—		—		(9,662)
	Distributions to noncontrolling affiliate			—		—		—		—		(834)		(834)
	Share issuance and equity-based
		compensation plans		23		1,456		—		—		—		1,479
Balance at June 30, 2018			$	13,331	$	94,984	$	387,498	$	(74,351)	$	1,215	$	422,677
Balance at December 31, 2016			$	13,278	$	112,475	$	364,414	$	(87,407)	$	9,846	$	412,606
	Net income			—		—		18,898		—		1,057		19,955
	Amounts reported in other comprehensive
		income		—		—		—		14,469		571		15,040
	Dividends ($0.70 per share)			—		—		(9,311)		—		—		(9,311)
	Share issuance and equity-based
		compensation plans		32		1,272		—		—		—		1,304
Balance at June 30, 2017			$	13,310	$	113,747	$	374,001	$	(72,938)	$	11,474	$	439,594

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 March 31, 2018			$	(25,129)	$	(34,009)	$	400	$	(58,738)
	Other comprehensive (loss) income before
		reclassifications		(16,940)		1,161		(895)		(16,674)
	Amounts reclassified from AOCI			—		779		681		1,460
	Current period other comprehensive (loss) income			(16,940)		1,940		(214)		(15,214)
	Related tax amounts			—		(444)		45		(399)
	Net current period other comprehensive (loss) income			(16,940)		1,496		(169)		(15,613)
Balance at June 30, 2018			$	(42,069)	$	(32,513)	$	231	$	(74,351)
Balance at March 31, 2017			$	(47,327)	$	(35,850)	$	1,216	$	(81,961)
	Other comprehensive income before
		reclassifications		7,265		268		225		7,758
	Amounts reclassified from AOCI			—		2,650		(275)		2,375
	Current period other comprehensive income (loss)			7,265		2,918		(50)		10,133
	Related tax amounts			—		(1,127)		17		(1,110)
	Net current period other comprehensive income (loss)			7,265		1,791		(33)		9,023
Balance at June 30, 2017			$	(40,062)	$	(34,059)	$	1,183	$	(72,938)

							Unrealized
			Currency		Defined		Gain (Loss) in
			Translation		Benefit		Available-for-
			Adjustments		Pension Plans		Sale Securities		Total
Balance at December 31, 2017			$	(31,893)	$	(34,093)	$	886	$	(65,100)
	Other comprehensive (loss) income before
		reclassifications		(10,176)		464		(1,338)		(11,050)
	Amounts reclassified from AOCI			—		1,562		509		2,071
	Current period other comprehensive (loss) income			(10,176)		2,026		(829)		(8,979)
	Related tax amounts			—		(446)		174		(272)
	Net current period other comprehensive (loss) income			(10,176)		1,580		(655)		(9,251)
Balance at June 30, 2018			$	(42,069)	$	(32,513)	$	231	$	(74,351)
Balance at December 31, 2016			$	(52,255)	$	(36,168)	$	1,016	$	(87,407)
	Other comprehensive income (loss) before
		reclassifications		12,193		(73)		890		13,010
	Amounts reclassified from AOCI			—		3,500		(635)		2,865
	Current period other comprehensive income			12,193		3,427		255		15,875
	Related tax amounts			—		(1,318)		(88)		(1,406)
	Net current period other comprehensive income			12,193		2,109		167		14,469
Balance at June 30, 2017			$	(40,062)	$	(34,059)	$	1,183	$	(72,938)