Equity and Noncontrolling Interest (Tables)

6 Months Ended

Jun. 30, 2012

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, 2012		$	12,951	$	90,836	$	184,764	$	(25,902)	$	8,015	$	270,664
	Net income		0		0		10,540		0		630		11,170
	Currency translation adjustments		0		0		0		(6,786)		(425)		(7,211)
	Defined benefit retirement plans		0		0		0		499		0		499
	Current period changes in fair value of derivatives		0		0		0		103		0		103
	Unrealized gain on available-for-sale securities		0		0		0		(5)		0		(5)
	Dividends ($0.245 per share)		0		0		(3,188)		0		0		(3,188)
	Dvidends paid to noncontrolling shareholders		0		0		0		0		(30)		(30)
	Share issuance and equity-based compensation plans		60		1,195		0		0		0		1,255
	Excess tax benefit from stock option exercises		0		168		0		0		0		168
Balance at June 30, 2012		$	13,011	$	92,199	$	192,116	$	(32,091)	$	8,190	$	273,425
Balance at March 31, 2011		$	11,531	$	39,132	$	152,237	$	(9,497)	$	7,359	$	200,762
	Net income		0		0		9,841		0		714		10,555
	Currency translation adjustments		0		0		0		3,587		69		3,656
	Defined benefit retirement plans		0		0		0		325		0		325
	Current period changes in fair value of derivatives		0		0		0		78		0		78
	Dividends ($0.24 per share)		0		0		(3,080)		0		0		(3,080)
	Stock offering, net of related expenses		1,265		46,878		0		0		0		48,143
	Share issuance and equity-based compensation plans		27		1,155		0		0		0		1,182
	Excess tax benefit from stock option exercises		0		84		0		0		0		84
Balance at June 30, 2011		$	12,823	$	87,249	$	158,998	$	(5,507)	$	8,142	$	261,705

								Accumulated
				Capital in				Other
		Common		Excess of		Retained		Comprehensive		Noncontrolling
		Stock		Par Value		Earnings		Loss		Interest		Total
Balance at December 31, 2011		$	12,912	$	89,725	$	175,932	$	(29,820)	$	6,977	$	255,726
	Net income		0		0		22,486		0		1,377		23,863
	Currency translation adjustments		0		0		0		(3,442)		(134)		(3,576)
	Defined benefit retirement plans		0		0		0		969		0		969
	Current period changes in fair value of derivatives		0		0		0		199		0		199
	Unrealized gain on available-for-sale securities		0		0		0		3		0		3
	Dividends ($0.485 per share)		0		0		(6,302)		0		0		(6,302)
	Dividends paid to noncontrolling interests		0		0		0		0		(30)		(30)
	Share issuance and equity-based compensation plans		99		1,054		0		0		0		1,153
	Excess tax benefit from stock option exercises		0		1,420		0		0		0		1,420
Balance at June 30, 2012		$	13,011	$	92,199	$	192,116	$	(32,091)	$	8,190	$	273,425
Balance at December 31, 2010		$	11,492	$	38,275	$	144,347	$	(13,736)	$	6,721	$	187,099
	Net income		0		0		20,441		0		1,344		21,785
	Currency translation adjustments		0		0		0		7,400		77		7,477
	Defined benefit retirement plans		0		0		0		649		0		649
	Current period changes in fair value of derivatives		0		0		0		174		0		174
	Unrealized loss on available-for-sale securities		0		0		0		6		0		6
	Dividends ($0.475 per share)		0		0		(5,790)		0		0		(5,790)
	Stock offering, net of related expenses		1,265		46,878		0		0		0		48,143
	Share issuance and equity-based compensation plans		66		1,934		0		0		0		2,000
	Excess tax benefit from stock option exercises		0		162		0		0		0		162
Balance at June 30, 2011		$	12,823	$	87,249	$	158,998	$	(5,507)	$	8,142	$	261,705