Sales Revenue by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	$ 318,971	$ 327,109	$ 954,394	$ 1,001,759
United States
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	95,816	99,726	298,434	313,963
Germany
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	45,380	49,263	125,992	134,948
JAPAN
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	24,224	20,341	61,706	57,472
China
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	19,212	17,872	58,517	54,065
Thailand
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	15,155	10,457	42,339	30,621
Brazil
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	11,867	14,701	38,375	41,582
FRANCE
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	10,644	12,534	34,654	35,729
Belgium
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	8,544	9,751	33,830	32,865
United Kingdom
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	8,893	8,011	27,313	28,770
Italy
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	8,299	9,424	25,865	32,822
Netherlands
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	6,673	6,118	19,959	22,332
Malaysia
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	7,877	6,664	19,944	19,802
Sweden
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	4,248	4,333	15,169	13,905
Taiwan
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	4,021	3,649	14,690	13,588
MEXICO
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	5,338	4,460	13,548	14,143
Canada
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	3,652	3,585	12,316	13,264
Argentina
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	2,721	3,798	11,317	12,709
South Korea
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	2,786	2,532	10,681	9,691
Austria
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	4,058	3,699	10,508	9,769
Turkey
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	3,054	7,743	9,606	19,333
Poland
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	2,836	5,589	7,432	9,400
All other countries
Segment Reporting Revenue Reconciling Item [Line Items]
Revenue	$ 23,673	$ 22,859	$ 62,199	$ 80,986