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)

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Entity-Wide Disclosure (Schedule of Net Sales by Geographic Area) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Net sales $ 695,995 $ 750,129 $ 484,403
North America (primarily the United States) [Member]      
Net sales 413,017 405,880 262,614
Europe and Middle East [Member]      
Net sales 148,169 183,462 126,214
Asia Pacific [Member]      
Net sales 122,257 150,475 90,023
Other [Member]      
Net sales $ 12,552 $ 10,312 $ 5,552