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International Operations and Geographic Information (Schedule of Geographic Net Sales and Location of Long-lived assets) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net sales | $ 844,748 | $ 879,577 | $ 839,055
Long-lived assets | 224,190 | 239,301 | 235,684
United States |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net sales | 615,028 | 635,923 | 571,817
Long-lived assets | 166,707 | 174,811 | 168,404
United Kingdom |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net sales | 45,184 | 59,621 | 58,976
Long-lived assets | 16,254 | 20,338 | 20,840
France |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net sales | 79,070 | 80,762 | 93,699
Long-lived assets | 16,772 | 18,755 | 21,728
Canada |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net sales | 48,357 | 44,388 | 54,087
Long-lived assets | 19,435 | 21,466 | 23,354
Australia |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net sales | 13,580 | 13,801 | 13,702
Long-lived assets | 1,401 | 1,189 | 1,358
Other |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Net sales | 43,529 | 45,082 | 46,774
Brazil |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Long-lived assets | $ 3,621 | $ 2,742 | $ 0

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