Sales Revenue by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	$ 327,109	$ 342,635	$ 1,001,759	$ 1,126,704
Operating Segment
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	327,109	342,635	1,001,759	1,126,704
Operating Segment | United States
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	99,726	103,114	313,963	375,453
Operating Segment | Germany
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	49,263	52,078	134,948	152,277
Operating Segment | Japan
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	20,341	23,561	57,472	64,757
Operating Segment | China
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	17,872	19,324	54,065	59,241
Operating Segment | Brazil
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	14,701	11,807	41,582	37,627
Operating Segment | France
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	12,534	12,361	35,729	39,188
Operating Segment | Belgium
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	9,751	10,745	32,865	36,340
Operating Segment | Italy
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	9,424	10,445	32,822	34,945
Operating Segment | Thailand
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	10,457	10,750	30,621	32,382
Operating Segment | United Kingdom
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	8,011	7,411	28,770	30,499
Operating Segment | Netherlands
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	6,118	6,076	22,332	26,867
Operating Segment | Malaysia
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	6,664	2,673	19,802	12,789
Operating Segment | Turkey
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	7,743	5,293	19,333	24,071
Operating Segment | Mexico
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	4,460	3,443	14,143	9,891
Operating Segment | Sweden
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	4,333	5,361	13,905	14,067
Operating Segment | Taiwan
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	3,649	4,744	13,588	14,784
Operating Segment | Canada
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	3,585	4,170	13,264	14,769
Operating Segment | Argentina
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	3,798	3,371	12,709	11,144
Operating Segment | Austria
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	3,699	4,467	9,769	14,622
Operating Segment | South Korea
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	2,532	4,068	9,691	12,457
Operating Segment | Poland
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	5,589	6,758	9,400	16,879
Operating Segment | Australia
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	507	4,348	7,492	13,128
Operating Segment | All other countries
Segment Reporting Revenue Reconciling Item [Line Items]
Sales revenue	$ 22,352	$ 26,267	$ 73,494	$ 78,527