Equity and Noncontrolling Interest (Tables)

6 Months Ended

Jun. 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 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
Balance at March 31, 2016			$	13,236	$	107,950	$	329,684	$	(68,002)	$	8,658	$	391,526
	Net income			—		—		15,015		—		390		15,405
	Amounts reported in other comprehensive
		loss		—		—		—		(3,788)		(153)		(3,941)
	Dividends ($0.345 per share)			—		—		(4,572)		—		—		(4,572)
	Share issuance and equity-based
		compensation plans		14		1,769		—		—		—		1,783
	Excess tax benefit from stock option exercises			—		32		—		—		—		32
Balance at June 30, 2016			$	13,250	$	109,751	$	340,127	$	(71,790)	$	8,895	$	400,233

									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			—		—		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
Balance at December 31, 2015			$	13,288	$	106,333	$	326,740	$	(73,316)	$	8,198	$	381,243
	Net income			—		—		27,961		—		788		28,749
	Amounts reported in other comprehensive
		income (loss)		—		—		—		1,526		(91)		1,435
	Repurchases of common stock			(84)		—		(5,775)		—		—		(5,859)
	Dividends ($0.665 per share)			—		—		(8,799)		—		—		(8,799)
	Share issuance and equity-based
		compensation plans		46		3,282		—		—		—		3,328
	Excess tax benefit from stock option exercises			—		136		—		—		—		136
Balance at June 30, 2016			$	13,250	$	109,751	$	340,127	$	(71,790)	$	8,895	$	400,233

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, 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)
Balance at March 31, 2016			$	(33,873)	$	(35,064)	$	935	$	(68,002)
	Other comprehensive (loss) income before
		reclassifications		(4,939)		590		320		(4,029)
	Amounts reclassified from AOCI			—		802		(82)		720
	Current period other comprehensive (loss) income			(4,939)		1,392		238		(3,309)
	Related tax amounts			—		(398)		(81)		(479)
	Net current period other comprehensive (loss) income			(4,939)		994		157		(3,788)
Balance at June 30, 2016			$	(38,812)	$	(34,070)	$	1,092	$	(71,790)

							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		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)
Balance at December 31, 2015			$	(38,544)	$	(35,251)	$	479	$	(73,316)
	Other comprehensive (loss) income before
		reclassifications		(268)		113		512		357
	Amounts reclassified from AOCI			—		1,600		416		2,016
	Current period other comprehensive (loss) income			(268)		1,713		928		2,373
	Related tax amounts			—		(532)		(315)		(847)
	Net current period other comprehensive (loss) income			(268)		1,181		613		1,526
Balance at June 30, 2016			$	(38,812)	$	(34,070)	$	1,092	$	(71,790)