Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Entity-Wide Disclosure (Schedule of Net Sales by Geographic Area) (Details)

v3.7.0.1
Entity-Wide Disclosure (Schedule of Net Sales by Geographic Area) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Segment Reporting Information [Line Items]      
Net sales $ 672,458 $ 695,995 $ 750,129
North America (primarily the United States) [Member]      
Segment Reporting Information [Line Items]      
Net sales 399,870 413,017 405,880
Europe and Middle East [Member]      
Segment Reporting Information [Line Items]      
Net sales 137,924 148,169 183,462
Asia Pacific [Member]      
Segment Reporting Information [Line Items]      
Net sales 122,998 122,257 150,475
Other [Member]      
Segment Reporting Information [Line Items]      
Net sales $ 11,666 $ 12,552 $ 10,312