Segment Reporting - Geographic Schedul of Revenue and Long-lived Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales	$ 231,466	$ 245,469	$ 249,492	$ 253,410	$ 233,229	$ 253,713	$ 273,410	$ 292,714	$ 979,837	$ 1,053,066	$ 1,270,368
Long-Lived Assets	72,835				76,694				72,835	76,694	79,640
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales									736,236	817,714	988,161
Long-Lived Assets	58,278				63,667				58,278	63,667	68,253
Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net Sales									243,601	235,352	282,207
Long-Lived Assets	$ 14,557				$ 13,027				$ 14,557	$ 13,027	$ 11,387